A&P Chapters 17 - 18 (Multiple Choice Questions Only) Flashcards
1
Q
- Which of the following is not a general function of muscle tissue?
a. movement
b. protection
c. heat production
d. posture
A
b. protection
p. 362
Chapter 17: Muscle Contraction
2
Q
- The skeletal muscle fiber characteristic of excitability directly results in these cells being capable of:
a. responding to nerve signals.
b. shortening.
c. returning to resting length after contracting.
d. producing heat.
A
a. responding to nerve signals.
p. 362
Chapter 17: Muscle Contraction
3
Q
- The correct order of arrangement of skeletal muscle cells, from largest to smallest, is:
a. fiber, myofibril, myofilament.
b. myofibril, myofilament, fiber.
c. myofilament, myofibril, fiber.
d. fiber, myofilament, myofibril.
A
a. fiber, myofibril, myofilament.
p. 364
Chapter 17: Muscle Contraction
4
Q
- Sarcoplasmic reticulum is:
a. a system of transverse tubules that extend at a right angle to the long axis of the cell.
b. a segment of the myofibril between two successive Z lines.
c. a unique name for the plasma membrane of a muscle fiber.
d. none of the above
A
d. none of the above
p. 362
Chapter 17: Muscle Contraction
5
Q
- Which of the following are myofilament proteins?
a. troponin
b. tropomyosin
c. a and b
d. none of the above
A
c. a and b
p. 366
Chapter 17: Muscle Contraction
6
Q
- The contractile unit of a myofibril is the:
a. sarcomere.
b. triad.
c. sarcolemma.
d. cross-bridge.
A
a. sarcomere.
p. 364
Chapter 17: Muscle Contraction
7
Q
- The chief function of the T tubule is to:
a. provide nutrients to the muscle fiber.
b. allow the fiber to contract.
c. allow the electrical signal to move deep into the cell.
d. allow the generation of new muscle fibers.
A
c. allow the electrical signal to move deep into the cell.
p. 362
Chapter 17: Muscle Contraction
8
Q
- Myosin heads are also called:
a. cross-bridges.
b. motor endplates.
c. synapses.
d. motor neurons.
A
a. cross-bridges.
p. 366
Chapter 17: Muscle Contraction
9
Q
- During muscle contraction, Ca++ is released from the:
a. synaptic cleft.
b. mitochondria.
c. sarcoplasmic reticulum.
d. sarcoplasm.
A
c. sarcoplasmic reticulum.
p. 368
Chapter 17: Muscle Contraction
10
Q
- The region of a muscle fiber where a motor neuron connects to the muscle fiber is called the:
a. synaptic vesicle.
b. motor endplate.
c. H band.
d. none of the above.
A
b. motor endplate.
p. 366
Chapter 17: Muscle Contraction
11
Q
- The principal component(s) of a motor unit is/are:
a. one somatic motor neuron.
b. the muscle fibers supplied by a somatic motor neuron.
c. none of the above.
d. both a and b.
A
d. both a and b.
p. 374
Chapter 17: Muscle Contraction
12
Q
- The staircase phenomenon is also known as:
a. tetanus.
b. electromyography.
c. wave summation.
d. treppe.
A
d. treppe.
p. 375
Chapter 17: Muscle Contraction
13
Q
- Skeletal muscles are innervated by:
a. somatic motor neurons.
b. autonomic motor neurons.
c. both a and b.
d. internal stimulation.
A
a. somatic motor neurons.
p. 374
Chapter 17: Muscle Contraction
14
Q
- Which of the following statements concerning isometric contractions is true?
a. The length of the muscle changes.
b. Muscle tension decreases.
c. Joint movements are swift.
d. Muscle length remains constant.
A
d. Muscle length remains constant.
p. 380
Chapter 17: Muscle Contraction
15
Q
- Physiologic muscle fatigue is caused by:
a. relative lack of ATP.
b. oxygen debt.
c. lack of will.
d. none of the above.
A
a. relative lack of ATP.
p. 377
Chapter 17: Muscle Contraction
16
Q
- Increase in muscle size is called:
a. hyperplasia.
b. atrophy.
c. hypertrophy.
d. treppe.
A
c. hypertrophy.
p. 378
Chapter 17: Muscle Contraction
17
Q
- Endurance training is also called:
a. isometrics.
b. hypertrophy.
c. aerobic training.
d. anaerobic training.
A
c. aerobic training.
p. 378
Chapter 17: Muscle Contraction
18
Q
- When a muscle does not shorten and no movement results, the contraction is:
a. isometric.
b. isotonic.
c. twitch.
d. tetanic.
A
a. isometric.
p. 380
Chapter 17: Muscle Contraction
19
Q
- Pushing against a wall is an example of which type of contraction?
a. isotonic
b. isometric
c. twitch
d. tetanic
A
b. isometric
p. 380
Chapter 17: Muscle Contraction
20
Q
- Prolonged inactivity causes muscles to shrink in mass, a condition called:
a. hypertrophy.
b. disuse atrophy.
c. paralysis.
d. muscle fatigue.
A
b. disuse atrophy.
p. 378
Chapter 17: Muscle Contraction
21
Q
- Muscle fibers usually contract to about _______% of their starting length.
a. 50
b. 60
c. 70
d. 80
A
d. 80
p. 369
Chapter 17: Muscle Contraction
22
Q
- Which statement is true of smooth muscle?
a. It lines the walls of many hollow organs.
b. It is striated.
c. It is voluntary.
d. There are many T tubules throughout smooth muscle.
A
a. It lines the walls of many hollow organs.
p. 381
Chapter 17: Muscle Contraction
23
Q
- Which of the following is/are classified as nerve fibers?
a. axon
b. dendrites
c. both a and b
d. none of the above
A
c. both a and b
p. 399
Chapter 18: Nervous System Cells
24
Q
- Which of the following conduct impulses toward the cell body?
a. axons
b. dendrites
c. Nissl bodies
d. none of the above
A
b. dendrites
p. 399
Chapter 18: Nervous System Cells
25
19. A neuron with one axon and several dendrites is a:
a. multipolar neuron.
b. unipolar neuron.
c. bipolar neuron.
d. none of the above
a. multipolar neuron.
p. 401
Chapter 18: Nervous System Cells
26
20. Which type of neuron lies entirely within the CNS?
a. afferent
b. efferent
c. interneuron
d. none of the above
c. interneuron
p. 402
Chapter 18: Nervous System Cells
27
21. Which sequence best represents the course of an impulse over a reflex arc?
a. receptor, synapse, sensory neuron, motor neuron, effector
b. effector, sensory neuron, synapse, motor neuron, receptor
c. receptor, motor neuron, synapse, sensory neuron, effector
d. receptor, sensory neuron, interneuron, motor neuron, effector
d. receptor, sensory neuron, interneuron, motor neuron, effector
p. 402
Chapter 18: Nervous System Cells
28
22. A complete nerve, consisting of numerous fascicles and their blood supply, is held together by a fibrous coat called the:
a. endoneurium.
b. perineurium.
c. epineurium.
d. fascicles.
c. epineurium.
p. 404
Chapter 18: Nervous System Cells
29
23. Small, distinct regions of gray matter within the CNS are usually called:
a. white matter.
b. nuclei.
c. ganglia.
d. fascicles.
b. nuclei.
p. 404
Chapter 18: Nervous System Cells
30
24. Nerves that contain mostly efferent fibers are called:
a. sensory nerves.
b. motor nerves.
c. mixed nerves.
d. Schwann nerves.
b. motor nerves.
p. 404
Chapter 18: Nervous System Cells
31
25. Gray matter in the CNS consists of:
a. nerve fibers.
b. neuroglia.
c. axons.
d. cell bodies.
d. cell bodies.
p. 404
Chapter 18: Nervous System Cells
32
26. Most nerves in the human nervous system are:
a. sensory nerves.
b. motor nerves.
c. mixed nerves.
d. reflex nerves.
c. mixed nerves.
p. 404
Chapter 18: Nervous System Cells
33
27. ______ Evidence now indicates that neurons may be replaced.
True or False
27. True
p. 404
Chapter 18: Nervous System Cell
34
28. ______ Regeneration of nerve fibers will occur if the cell body is intact and the fibers have a neurilemma.
True or False
28. True
p. 404
Chapter 18: Nervous System Cell
35
29. ______ There are no differences between the CNS and PNS concerning the repair of damaged fibers.
True or False
29. False
p. 406
Chapter 18: Nervous System Cell
36
47. ______ axon
| a. Neurons or b. Neuroglia
47. a. Neurons
p. 399
Chapter 18: Nervous System Cell
37
48. ______ supporting cells
| a. neurons or b. neuroglia
48. b. Neuroglia
p. 395
Chapter 18: Nervous System Cell
38
49. ______ astrocytes
| a. neurons or b. neuroglia
49. b. Neuroglia
p. 395
Chapter 18: Nervous System Cell
39
50. ______ sensory
| a. neurons or b. neuroglia
50. a. Neurons
p. 402
Chapter 18: Nervous System Cell
40
51. ______ conduct impulses
| a. neurons or b. neuroglia
51. a. Neurons
p. 401
Chapter 18: Nervous System Cell
41
52. ______ form the myelin sheath around central nerve fibers
a. neurons or b. neuroglia
52. b. Neuroglia
p. 397
Chapter 18: Nervous System Cell
42
53. ______ phagocytosis
| a. neurons or b. neuroglia
53. b. Neuroglia
p. 396
Chapter 18: Nervous System Cell
43
54. ______ efferent
| a. neurons or b. neuroglia
54. a. Neurons
p. 401
Chapter 18: Nervous System Cell
44
55. ______ multiple sclerosis
| a. neurons or b. neuroglia
55. b. Neuroglia
p. 398
Chapter 18: Nervous System Cell
45
56. ______ multipolar
| a. neurons or b. neuroglia
56. a. Neurons
p. 400
Chapter 18: Nervous System Cell
