Seeley’s Anatomy & Physiology 11th Edition by Cinnamon VanPutte – Test Bank

Seeley’s Anatomy & Physiology 11th Edition by Cinnamon VanPutte – Test Bank

Chapter 09

Muscular System: Histology and Physiology

Multiple Choice Questions

1. Which of the following is NOT a function of skeletal muscle?
   A. body movement
   B. maintenance of posture
   C. respiration
   D. constriction of organs
   E. production of heat

Bloom’s Level: 1. Remember
HAPS Objective: G01.01 Describe the major functions of muscle tissue.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01B. Summarize the functions of the muscular system.
Section: 09.01
Topic: Muscular System
Type: Study Guide

2. Which of the following actions is caused by contraction of skeletal muscle?
   A. contraction of the heart
   B. moving your feet in walking
   C. movement of food through the digestive tract
   D. emptying of the urinary bladder
   E. vasoconstriction

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

3. Smooth muscle and cardiac muscle are similar in that they both
   A.are under involuntary control.
   B. are striated.
   C. are widely distributed in the body.
   D. have multiple nuclei.
   E. are under voluntary control.

Bloom’s Level: 2. Understand
HAPS Objective: G02.03 Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

4. The capacity of a muscle cell to shorten forcefully is known as
   A.contractility.
   B. excitability.
   C. extensibility.
   D. elasticity.
   E. flexibility.

Bloom’s Level: 1. Remember
HAPS Objective: G01.01 Describe the major functions of muscle tissue.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.02A. Explain the four functional properties of muscle tissue.
Section: 09.02
Topic: Muscular System
Type: Study Guide

5. Muscles exhibit the property of excitability. This means that the muscle
   A.shortens its length.
   B. recoils to its original resting length.
   C. stretches beyond its normal length.
   D. responds to stimulation by the nervous system.
   E. excites itself.

Bloom’s Level: 1. Remember
HAPS Objective: G01.01 Describe the major functions of muscle tissue.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.02A. Explain the four functional properties of muscle tissue.
Section: 09.02
Topic: Muscular System
Type: Study Guide

6. Identify the statement concerning general functional characteristics of muscle that is true.
   A. Muscle tissue shortens forcefully but lengthens passively.
   B. Muscle tissue shortens passively but lengthens forcefully.
   C. Muscle tissue can get shorter, but can not get longer.
   D. Muscle tissue can get longer, but can not get shorter.
   E. None of these statements are true.

Bloom’s Level: 2. Understand
HAPS Objective: G01.01 Describe the major functions of muscle tissue.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.02A. Explain the four functional properties of muscle tissue.
Section: 09.02
Topic: Muscular System
Type: Study Guide

7. Identify the statement concerning skeletal muscle that is true.
   A.It comprises about 20% of the body’s weight.
   B. It propels urine through the urinary tract.
   C. Its function is largely under involuntary control.
   D. It is a kind of connective tissue.
   E. It is responsible for locomotion.

Bloom’s Level: 2. Understand
HAPS Objective: G01.01 Describe the major functions of muscle tissue.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.02A. Explain the four functional properties of muscle tissue.
Section: 09.02
Topic: Muscular System
Type: Study Guide

8. Which of the following is true?
   A.Skeletal muscle is capable of spontaneous contraction.
   B. Smooth muscle is found in the walls of hollow organs.
   C. Cardiac muscle cells have multiple nuclei.
   D. Smooth muscle cells are long and cylindrical.
   E. There is a small amount of smooth muscle in the heart.

Bloom’s Level: 2. Understand
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

9. Skeletal muscle fibers
   A.possess striations.
   B. can contract but are not extensible or excitable.
   C. do not require nerve innervation to contract.
   D. increase dramatically in number after birth.
   E. are found in the walls of the stomach.

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

10. Which type of muscle tissue has spindle-shaped cells?
    A.skeletal muscle
    B. smooth muscle
    C. cardiac muscle
    D. both skeletal and cardiac muscle
    E. both cardiac and smooth muscle

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Objective: G02.03 Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

11. Which type of muscle tissue possesses striations?
    A.skeletal muscle
    B. smooth muscle
    C. cardiac muscle
    D. both skeletal and cardiac muscle
    E. both cardiac and smooth muscle

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Objective: G02.03 Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

12. Which type of muscle tissue is autorhythmic?
    A.skeletal muscle
    B. smooth muscle
    C. cardiac muscle
    D. both skeletal and cardiac muscle
    E. both cardiac and smooth muscle

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Objective: G02.03 Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Section: 09.09
Topic: Muscular System

13. Which type of muscle tissue is multinucleated?
    A.skeletal muscle
    B. smooth muscle
    C. cardiac muscle
    D. both skeletal and cardiac muscle
    E. both cardiac and smooth muscle

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Objective: G02.03 Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

14. Which type of muscle tissue has cells that branch?
    A.skeletal muscle
    B. smooth muscle
    C. cardiac muscle
    D. both skeletal and cardiac muscle
    E. both cardiac and smooth muscle

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Objective: G02.03 Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

15. Which type of muscle tissue would cause flexion and extension of the arm?
    A.skeletal muscle
    B. smooth muscle
    C. cardiac muscle

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Objective: G02.03 Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

16. Which type of muscle tissue causes contraction of the heart?
    A.skeletal muscle
    B. smooth muscle
    C. cardiac muscle

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Objective: G02.03 Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

17. What type of muscle tissue causes vasoconstriction?
    A.skeletal muscle
    B. smooth muscle
    C. cardiac muscle

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Objective: G02.03 Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

18. What type of muscle tissue causes peristalsis?
    A.skeletal muscle
    B. smooth muscle
    C. cardiac muscle

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Objective: G02.03 Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

19. What type of muscle tissue has neuromuscular junctions?
    A.skeletal muscle
    B. smooth muscle
    C. cardiac muscle

Bloom’s Level: 1. Remember
HAPS Objective: G02.02 Describe the structure, location in the body and function of skeletal, cardiac and smooth muscle.
HAPS Objective: G02.03 Compare and contrast the characteristics of skeletal, cardiac and smooth muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.01A. Summarize the major characteristics of skeletal, smooth, and cardiac muscle.
Section: 09.01
Topic: Muscular System
Type: Study Guide

20. Hypertrophy of skeletal muscles from weight lifting is caused by an increase in the
    A.number of muscle fibers.
    B. size of muscle fibers.
    C. number of striations.
    D. number of nuclei within the muscle fibers.
    E. number of muscle cells.

Bloom’s Level: 1. Remember
HAPS Objective: G03.01 Describe the organization of muscle tissue from cell to whole muscle to groups of muscles.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03C. Discuss the origin of muscle fibers and explain how muscle hypertrophy occurs.
Section: 09.03
Topic: Muscular System
Type: Study Guide

21. Skeletal muscle develops from multinucleated cells called
    A.fascicles.
    B. myoblasts.
    C. myofibrils.
    D. myotomes.
    E. fasciculi.

Bloom’s Level: 1. Remember
HAPS Objective: G03.01 Describe the organization of muscle tissue from cell to whole muscle to groups of muscles.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03C. Discuss the origin of muscle fibers and explain how muscle hypertrophy occurs.
Section: 09.03
Topic: Muscular System
Type: Study Guide

22. A fasciculus
    A.is a bundle of reticular fibers.
    B. is surrounded by perimysium.
    C. is only found in smooth muscle.
    D. possesses an external lamina.
    E. is a bundle of collagen fibers.

Bloom’s Level: 1. Remember
HAPS Objective: G03.01 Describe the organization of muscle tissue from cell to whole muscle to groups of muscles.
HAPS Objective: G03.02 Name the connective tissue layers that surround each cell, fascicle, muscle, and group of muscles and indicate the specific type of connective tissue that composes all of these layers.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03A. Describe the connective tissue components of skeletal muscle.
Section: 09.03
Topic: Muscular System
Type: Study Guide

Epimysium

1. surrounds individual muscles.
   B. separates muscle fibers.
   C. connects muscles to bone.
   D. is a type of muscle tissue.
   E. is a type of nerve tissue.

Bloom’s Level: 1. Remember
HAPS Objective: G03.02 Name the connective tissue layers that surround each cell, fascicle, muscle, and group of muscles and indicate the specific type of connective tissue that composes all of these layers.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03A. Describe the connective tissue components of skeletal muscle.
Section: 09.03
Topic: Muscular System
Type: Study Guide

24. Endomysium is a delicate network of loose connective tissue that
    A.surrounds each muscle fiber.
    B. forms a sheath around a fasciculus.
    C. is composed of elastic fibers.
    D. separates individual muscles.
    E. penetrates muscle fibers.

Bloom’s Level: 1. Remember
HAPS Objective: G03.02 Name the connective tissue layers that surround each cell, fascicle, muscle, and group of muscles and indicate the specific type of connective tissue that composes all of these layers.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03A. Describe the connective tissue components of skeletal muscle.
Section: 09.03
Topic: Muscular System
Type: Study Guide

25. Which of the following connective tissue layers is outside all the others?
    A.perimysium
    B. endomysium
    C. epimysium
    D. paramysium
    E. sarcolemma

Bloom’s Level: 1. Remember
HAPS Objective: G03.02 Name the connective tissue layers that surround each cell, fascicle, muscle, and group of muscles and indicate the specific type of connective tissue that composes all of these layers.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03A. Describe the connective tissue components of skeletal muscle.
Section: 09.03
Topic: Muscular System
Type: Study Guide

26. Which of the following is true about skeletal muscle?
    A.Sensory neurons stimulate muscles to contract.
    B. There are very few blood vessels in skeletal muscle.
    C. Every muscle fiber receives a branch of an axon from the nerve.
    D. There are very few nerve fibers in a muscle.
    E. All of these are true.

Bloom’s Level: 2. Understand
HAPS Objective: G03.01 Describe the organization of muscle tissue from cell to whole muscle to groups of muscles.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03B. Explain the blood supply and innervation of skeletal muscle.
Section: 09.03
Topic: Muscular System
Type: Study Guide

27. List the following structures in order from smallest to largest.
    (1) muscle fiber
    (2) myofilament
    (3) myofibril
    (4) muscle fasciculus
    A.4, 2, 3, 1
    B. 2, 1, 4, 3
    C. 3, 1, 4, 2
    D. 2, 3, 1, 4
    E. 1, 2, 3, 4

Bloom’s Level: 2. Understand
HAPS Objective: G03.01 Describe the organization of muscle tissue from cell to whole muscle to groups of muscles.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03D. Describe the components of a muscle fiber.
Section: 09.03
Topic: Muscular System
Type: Study Guide

28. Muscle myofibrils
    A.are found in the sarcolemma.
    B. extend from the sarcolemma to the T-tubule.
    C. contain myosin and actin myofilaments.
    D. hold muscle cells together.
    E. do not appear striated.

Bloom’s Level: 1. Remember
HAPS Objective: G03.03 Describe a skeletal muscle fiber including the transverse (T) tubules, sarcoplasmic reticulum and myofibrils.
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03E. Relate the types of myofilaments and describe their structures.
Section: 09.03
Topic: Muscular System
Type: Study Guide

29. Myosin is also known as the
    A. thick myofilament.
    B. thin myofilament.
    C. intermediate myofilament.
    D. short myofilament.
    E. sarcomere.

Bloom’s Level: 1. Remember
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03E. Relate the types of myofilaments and describe their structures.
Section: 09.03
Topic: Muscular System
Type: Study Guide

30. Actin myofilaments
    A.resemble bundles of minute golf clubs.
    B. contain both myosin and tropomyosin.
    C. are held in place by the M line.
    D. contain strands of fibrous actin.
    E. are the thickest proteins in muscle.

Bloom’s Level: 1. Remember
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03E. Relate the types of myofilaments and describe their structures.
Section: 09.03
Topic: Muscular System
Type: Study Guide

31. Which of the following is part of a thin myofilament?
    A.ATP-binding site
    B. globular (G) actin
    C. calcium
    D. myosin
    E. sarcolemma

Bloom’s Level: 1. Remember
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03E. Relate the types of myofilaments and describe their structures.
Section: 09.03
Topic: Muscular System
Type: Study Guide

32. Troponin
    A.has two subunits.
    B. is part of the myosin myofilament.
    C. is a long, flexible protein.
    D. has a calcium-binding site.
    E. binds to ATP.

Bloom’s Level: 1. Remember
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03E. Relate the types of myofilaments and describe their structures.
Section: 09.03
Topic: Muscular System
Type: Study Guide

33. Which of the following is composed of myosin molecules?
    A.thick myofilaments
    B. I Bands
    C. Z disks
    D. sarcolemma
    E. tropomyosin

Bloom’s Level: 1. Remember
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03E. Relate the types of myofilaments and describe their structures.
Section: 09.03
Topic: Muscular System
Type: Study Guide

34. The active sites to which cross-bridges attach are found on the
    A.sarcoplasmic reticulum.
    B. actin myofilaments.
    C. Z disks.
    D. T tubules.
    E. myosin myofilaments.

Bloom’s Level: 1. Remember
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03E. Relate the types of myofilaments and describe their structures.
Section: 09.03
Topic: Muscular System
Type: Study Guide

35. ATPase is found in
    A.F-actin strands.
    B. G-actin globular units.
    C. myosin heads.
    D. tropomyosin grooves.
    E. troponin molecules.

Bloom’s Level: 1. Remember
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03E. Relate the types of myofilaments and describe their structures.
Section: 09.03
Topic: Muscular System
Type: Study Guide

36. Which of the following is NOT a property of the myosin head?
    A.They form cross-bridges with the active sites of actin.
    B. They have a hinge region to bend and straighten.
    C. They bind to troponin.
    D. They have ATPase activity.
    E. They bind to ATP.

Bloom’s Level: 1. Remember
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03E. Relate the types of myofilaments and describe their structures.
Section: 09.03
Topic: Muscular System
Type: Study Guide

37. The region of the sarcomere that contains both actin and myosin myofilaments is called the
    A.I band.
    B. A band.
    C. Z disk.
    D. H zone.
    E. M line.

Bloom’s Level: 1. Remember
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03F. Produce diagrams that illustrate the arrangement of myofilaments in a sarcomere.
Section: 09.03
Topic: Muscular System
Type: Study Guide

38. A sarcomere extends from
    A.one Z disk to an adjacent Z disk.
    B. one T tubule to the next T tubule.
    C. the middle of the I band to the middle of the A band.
    D. the H zone to the I band.
    E. the M line to the next M line.

Bloom’s Level: 1. Remember
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03F. Produce diagrams that illustrate the arrangement of myofilaments in a sarcomere.
Section: 09.03
Topic: Muscular System
Type: Study Guide

39. Which of the following is mismatched?
    A.I band – contains only actin
    B. M line – middle of the H zone
    C. Z disk – structure between adjacent sarcomeres
    D. myosin myofilaments – thin myofilaments
    E. actin myofilaments – thin myofilaments

Bloom’s Level: 1. Remember
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03F. Produce diagrams that illustrate the arrangement of myofilaments in a sarcomere.
Section: 09.03
Topic: Muscular System
Type: Study Guide

40. A sarcomere is the
    A.cell membrane of a muscle fiber.
    B. cytoplasm of muscle cells.
    C. structural and functional unit of the skeletal muscle cell.
    D. contractile thread that extends the length of the muscle fiber.
    E. protein strand composed of actin or myosin.

Bloom’s Level: 1. Remember
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03F. Produce diagrams that illustrate the arrangement of myofilaments in a sarcomere.
Section: 09.03
Topic: Muscular System
Type: Study Guide

41. Sarcoplasm is the
    A.cell membrane of a muscle fiber.
    B. cytoplasm of muscle cells.
    C. structural and functional unit of the skeletal muscle cell.
    D. contractile thread that extends the length of the muscle fiber.
    E. protein strand composed of actin or myosin.

Bloom’s Level: 1. Remember
HAPS Objective: G03.03 Describe a skeletal muscle fiber including the transverse (T) tubules, sarcoplasmic reticulum and myofibrils.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03D. Describe the components of a muscle fiber.
Section: 09.03
Topic: Muscular System
Type: Study Guide

42. A myofilament is the
    A.cell membrane of a muscle fiber.
    B. cytoplasm of muscle cells.
    C. structural and functional unit of the skeletal muscle cell.
    D. contractile thread that extends the length of the muscle fiber.
    E. protein strand composed of actin or myosin.

Bloom’s Level: 1. Remember
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Objective: G03.05 Name, and describe the function of, each of the contractile, regulatory, and structural protein components of a sarcomere.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03E. Relate the types of myofilaments and describe their structures.
Section: 09.03
Topic: Muscular System
Type: Study Guide

43. The sarcolemma is the
    A.cell membrane of a muscle fiber.
    B. cytoplasm of muscle cells.
    C. structural and functional unit of the skeletal muscle cell.
    D. contractile thread that extends the length of the muscle fiber.
    E. protein strand composed of actin.

Bloom’s Level: 1. Remember
HAPS Objective: G03.03 Describe a skeletal muscle fiber including the transverse (T) tubules, sarcoplasmic reticulum and myofibrils.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03D. Describe the components of a muscle fiber.
Section: 09.03
Topic: Muscular System
Type: Study Guide

44. A myofibril is the
    A.cell membrane of a muscle fiber.
    B. cytoplasm of muscle cells.
    C. structural and functional unit of the skeletal muscle cell.
    D. contractile thread that extends the length of the muscle fiber.
    E. protein strand composed of actin.

Bloom’s Level: 1. Remember
HAPS Objective: G03.03 Describe a skeletal muscle fiber including the transverse (T) tubules, sarcoplasmic reticulum and myofibrils.
HAPS Objective: G03.04 Explain the organization of a myofibril.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03D. Describe the components of a muscle fiber.
Section: 09.03
Topic: Muscular System
Type: Study Guide

45. Which of the following statements regarding the sliding filament model is false?
    A.Actin and myosin do not shorten during contraction.
    B. Both actin and myosin myofilaments shorten during contraction.
    C. The sarcomere shortens.
    D. The I band and H zones become narrower during contraction.
    E. The A band remains constant in length.

Bloom’s Level: 2. Understand
HAPS Objective: G04.01 Explain the sliding filament theory of muscle contraction.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03G. Describe how the sliding filament model explains the contraction of muscle fibers.
Learning Outcome: 09.03H. Explain what happens to the length of the A band, I band, and H zone during contraction.
Section: 09.03
Topic: Muscular System
Type: Study Guide

46. The length of the resting sarcomere is
    A.longer than the length of a contracted sarcomere.
    B. shorter than the length of a contracted sarcomere.
    C. the same length as a contracted sarcomere.
    D. the same length as the muscle fiber.
    E. the same length as the myofibril.

Bloom’s Level: 1. Remember
HAPS Objective: G04.01 Explain the sliding filament theory of muscle contraction.
HAPS Objective: G04.02 Describe the sequence of events involved in the contraction cycle of skeletal muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03H. Explain what happens to the length of the A band, I band, and H zone during contraction.
Section: 09.03
Topic: Muscular System
Type: Study Guide

47. The model that describes the contraction of the muscle is called the
    A.contraction cycle.
    B. power stroke.
    C. sliding filament model.
    D. slipping fibril mechanism.
    E. paddle model.

Bloom’s Level: 1. Remember
HAPS Objective: G04.01 Explain the sliding filament theory of muscle contraction.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.03G. Describe how the sliding filament model explains the contraction of muscle fibers.
Section: 09.03
Topic: Muscular System
Type: Study Guide

48. The electrical properties of cells are the result of
    A.ion concentration differences across the plasma membrane.
    B. receptor sites that are present on the plasma membrane.
    C. phosphorylation reactions within the cytoplasm.
    D. phospholipids in the cell membrane.
    E. None of these choices is correct.

Bloom’s Level: 1. Remember
HAPS Objective: G04.01 Explain the sliding filament theory of muscle contraction.
HAPS Objective: G04.02 Describe the sequence of events involved in the contraction cycle of skeletal muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.04B. Explain the role of ion channels in the production of an action potential.
Section: 09.04
Topic: Muscular System

49. Which of the following causes an unequal ion concentration across the resting plasma membrane?
    A.the functioning of the sodium-chloride pump
    B. negatively charged proteins do not readily diffuse across the plasma membrane
    C. the attraction of chloride ions to other intracellular anions
    D. the repulsion of potassium ions by the intracellular anions
    E. the attraction of sodium ions to chloride ions

Bloom’s Level: 1. Remember
HAPS Objective: G04.01 Explain the sliding filament theory of muscle contraction.
HAPS Objective: G04.02 Describe the sequence of events involved in the contraction cycle of skeletal muscle.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.04B. Explain the role of ion channels in the production of an action potential.
Section: 09.04
Topic: Muscular System

50. Which of the following is true during the resting membrane potential?
    A.Sodium ion concentration is greater inside cells.
    B. Negatively charged proteins are more concentrated outside the cell.
    C. A greater concentration of calcium ions is found inside the cell.
    D. Potassium is concentrated primarily inside the cell.
    E. None of these choices reflect what occurs during the resting membrane potential.

Bloom’s Level: 2. Understand
HAPS Objective: G04.01 Explain the sliding filament theory of muscle contraction.
HAPS Objective: G04.02 Describe the sequence of events involved in the contraction cycle of skeletal muscle.
Learning Outcome: 09.04A. Describe the resting membrane potential and how it is generated and maintained.
Section: 09.04
Topic: Muscular System
Type: Study Guide

51. The outside of the resting plasma membrane is __________ relative to the inside of the resting plasma membrane.
    A.positively charged
    B. negatively charged
    C. electrically neutral
    D. recharged
    E. None of these choices is correct.

Bloom’s Level: 1. Remember
HAPS Objective: G04.03 Explain how an electrical signal from the nervous system arrives at the neuromuscular junction.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.04A. Describe the resting membrane potential and how it is generated and maintained.
Section: 09.04
Topic: Muscular System

52. The plasma membrane of an excitable cell is more permeable to potassium ions because
    A.of its positive electrical charge.
    B. there are more leak ion channels for K+ than Na+.
    C. protein molecules cannot exit through the cell membrane.
    D. calcium ions block Na+ and Cl- channels.
    E. there are more gated channels for K+.

Bloom’s Level: 1. Remember
HAPS Objective: G04.05 Explain what is meant by the expression “excitation-contraction coupling”.
HAPS Topic: Module G Muscular System
Learning Outcome: 09.04B. Explain the role of ion channels in the production of an action potential.
Section: 09.04
Topic: Muscular System

53. In which of the following situations does a resting membrane potential exist?
    A.a relaxed muscle fiber
    B. a conducting neuron
    C. a stimulated sensory receptor in the skin
    D. a contracting cardiac muscle cell
    E. the eye seeing an image