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Multiple-Choice Quiz (Level I)

Multiple-Choice Quiz (Level I)

This activity contains 28 questions.

Question 1
1 All of the following are functions of muscle EXCEPT
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Question 2
2 An entire skeletal muscle is surrounded by
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Question 3
3 As an axon enters a muscle, it branches into a number of axonal terminals, each of which forms a neuromuscular junction with a single muscle fiber. A motor neuron and all the muscle fibers it supplies is called a
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Question 4
4 During muscle contraction, all of the following occur EXCEPT
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Question 5
5 What is the ion released from the terminal cisternae that combines with troponin and removes the blocking action of tropomyosin, resulting in formation of cross bridges?
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Question 6
6 Each skeletal muscle fiber is controlled by a neuron at a single
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Question 7
7 In a skeletal muscle fiber, which of the following best describes the composition of the structure known as a triad?
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Question 8
8 In the sliding filament model of muscle contraction, the myofilaments slide over each other, resulting in an overlapping of actin and _________.
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Question 9
9 Interactions between actin and myosin filaments of the sarcomere are responsible for
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Question 10
10 The all-or-none response of a muscle fiber means that
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Question 11
11 The dense layer of collagen fibers that surround an entire skeletal muscle is the
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Question 12
12 The functional unit of a skeletal muscle fiber is the
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Question 13
13 Which statement below does NOT represent a role of ionic calcium in muscle contraction?
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Question 14
14 The space between the neuron and the muscle is the
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Question 15
15 The term that means a continued mild or partial contraction of an entire muscle is muscle
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Question 16
16 The type of muscle contraction in which the muscle fibers produce increased tension but the muscle neither shortens nor lengthens is called
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Question 17
17 What is the role of calcium ions in the contraction of skeletal muscle?
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Question 18
18 Which of the following statements about smooth muscle is true?
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Question 19
19 Which of the following statements is INCORRECT?
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Question 20
20 Which of the following substances increases in quantity during repetitive muscle contraction?
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Question 21
21 The sequence of electrical changes that occurs along the sarcolemma when a muscle fiber is stimulated is known as the
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Question 22
22 In the early stage of repolarization, the sarcolemma is restored to its initial polarized state initially by
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Question 23
23 During repolarization, the initial events restore only the electrical conditions while the Na+/K+ pump restores the
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Question 24
24 Which of the following moves Ca2+ back into the tubules of the SR after a contraction?
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Question 25
25 Which of the following allows recoil of the muscle fiber when contraction ends?
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Question 26
26 Which one of the following binds calcium ions in a smooth muscle causing contraction?
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Question 27
27 Which of the following events is something a smooth muscle can do but cardiac and skeletal muscle can not do?
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Question 28
28 Which of the following types of muscle is found in the eye and are used to regulate the size of the pupil?
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