Untitled Flashcard Set

1.     The movable end of a muscle is its

2.                 Transverse (T) tubules

3.                 During muscle contraction, the width of _______the remains constant.

4.                 Myofibrils are composed primarily of

5.                 Myofibrils are surrounded by modified endoplasmic reticulum called the

6.                 What collagen structure attaches skeletal muscle to bone?

7.                 Which of the following muscles has its insertion on the sternum?

8.                 Muscle atrophy that progresses with aging is caused by reduction in

9.                 Which of the following muscles compresses the abdomen?

10.             A muscle that assists the prime mover is called a(n)

11.             Cardiac muscle

12.             The type of muscle cell that lacks transverse tubules, has one nucleus, and is involuntary is

13.             Age-related muscle atrophy involves a reduction in

14.             A threshold stimulus is the

15.             Skeletal muscles will contract

16.             The muscles that support, move, and brace the limbs are called

17.             The linea alba is

18.             Acetylcholine release at a neuromuscular junction is triggered by

19.             The first event in muscle-fiber contraction is that

20.             Increasing the number of active motor units in a contracting muscle is called

21.             A plank held in a fixed position primarily involves an contraction of the abdominal muscles.

22.             Substances muscle cells create as energy reserves while at rest include

23.             Oxygen debt may develop because

24.             Compared with skeletal muscle, smooth muscle generally

25.             Substances muscle cells create as energy reserves while at rest include

26.             Which of these phrases most aptly describes "muscle insertion"?

27.             The sternocleidomastoid originates on the

28.             The triangle of auscultation, commonly used to hear sounds of respiratory organs, is located near the border of the

29.             A compartment (bundle) of muscle fibers is called a(n)

30.             What is the connective tissue that surrounds a muscle organ called?

31.             The cell membrane of a muscle cell is called the

32.             The boundaries between adjacent sarcomeres are marked by

33.             During muscle contraction, the ______________ become smaller.

34.             During muscle contraction, the _________ move closer together.

35.             Transverse tubules and sarcoplasmic reticulum are especially well developed in

36.             Which of the following is not a function of skeletal muscle?

37.             Functions of muscles include

38.             Skeletal muscles help maintain body temperature because

39.             The muscle primarily responsible for producing a movement is the

40.             Which of the following is not an axial muscle?

41.             The two major divisions of the skeleton are

42.             The special functional connection between a motor neuron and a skeletal muscle fiber is the

43.             Axon terminals at neuromuscular junctions contain vesicles filled with

44.             The enzyme that inactivates acetylcholine is

45.             At a neuromuscular junction, the folded muscle-fiber membrane forms the

46.             Arrange these contraction events in the correct sequence:

1.           The muscle impulse reaches the sarcoplasmic reticulum and calcium is released.

2.           Thin filaments are pulled over thick filaments.

3.           Calcium enters the sarcoplasm and binds to troponin, exposing active sites.

4.           The impulse arrives at the synapse and travels through transverse tubules.

5.           The muscle fiber shortens and contracts.

6.           Tropomyosin moves away, allowing actin and myosin to link.

47.             Wave summation with no relaxation phase is called

48.             A motor neuron and all the muscle fibers it innervates form a

49.             Strength of skeletal-muscle contraction depends mainly on how

50.             A contraction that changes a skeletal muscle’s length is

51.             In a muscle-twitch recording, the delay between a stimulus and the beginning of muscle response is the

52.             The brief time after stimulation when a muscle remains unresponsive to additional stimulation is the

53. Creatine phosphate

54.             Athletes tend to experience muscle fatigue less quickly than nonathletes because they

55.             Smooth muscle lacks

56.             Short muscle cells with centrally located nuclei are

57.             Structures that connect cardiac muscle cells are

58.             Which of the following is not a type of fascicle arrangement?

64.        Muscles located close to the midline of the body may be called

59.             Which muscle is named for shape and size?

60.             The ________ extends the neck.

61.             Which of the following is not a muscle of mastication?

62.             The sleus is a muscle that forms part of the