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A&p Chapter 10 - Muscular Tissue

15 Questions  I  By MelMH
A&P Chapter 10 - Muscular Tissue
For Anatomy

  
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1.  A single somatic motor neuron and all of the muscle fibers it stimulates is known as a                           .
2.  The wasting away of muscle due to lack of use is known as                         while the replacement of skeletal muscle fibers with scar tissue is known as                       .
3.  The synaptic end bulbs of somatic motor neurons contain synaptic vesicles filled with the neurotransmitter                             .
4.  The ability of muscle cells to respond to stimuli and produce electrical signals is known as excitability.
A.
B.
5.  The sequence of events resulting in skeletal muscle contraction are: a) generation of a nerve impulse; b) release of the neurotransmitter acetylcholine; c) generation of a muscle action potential; d) release of calcium ions from the sacroplasmic reticulum; e) calcium ion binding to troponin; f) power stroke with actin and myosin binding and release.
A.
B.
6.  In muscle physiology, the latent period refers to:
A.
B.
C.
D.
E.
7.  Which of the following muscle proteins and their descriptions are mismatched?
A.
B.
C.
D.
E.
8.  During muscle contraction all of the following occur except
A.
B.
C.
D.
E.
9.  Which of the following is not true concerning sarcomeres (before contraction begins) and muscle fiber length-tension relationships?
A.
B.
C.
D.
E.
10.  Which of the following are sources of ATP for muscle contraction? 1) creatine phosphate, 2) glycolysis, 3) anaerobic cellular respiration 4) aerobic cellular respiration, 5) acetylcholine
A.
B.
C.
D.
E.
11.  What would happen if ATP were suddenly unavailable after the sarcomere had begun to shorten?
A.
B.
C.
D.
E.
12.  Match the following:
A. a sheath of areolar connective tissue that wraps around individual skeletal muscle fibers
A.
B. dense irregular connective tissue that separates a muscle into groups of individual muscle fibers
B.
C. bundles of muscle fibers
C.
D. the outermost connective tissue layer that encircles an entire skeletal muscle
D.
E. dense irregular conncetive tissue that lines the body wall and limbs and holds functional muscle units together
E.
F. a cord of dense regular connective tissue that attaches muscle to the periosteum of bone
F.
G. muscle cell
G.
H. areolar and adipose connective tissue that separates muscle from skin
H.
I. connective tissue elements extended as a broad, flat layer
I.
J. a two-layer tube of fibrous connective tissue enclosing certain tendons
J.
13.  Match the following:
A. invaginations of the sarcolemma from the surface toward the center of the muscle fiber
A.
B. myoblasts that persist in mature skeletal muscle
B.
C. plasma membrane of a muscle fiber
C.
D. ozygen-binding protein found only in muscle fibers
D.
E. Ca2+ storing tubular system similar to smooth endoplasmic reticulum
E.
F. contracting unit of a skeletal muscle fiber
F.
G. middle area in the sarcomere where thick and thin filaments are found
G.
H. area in the sarcomere where only thin filaments are present but thick filaments are not
H.
I. separates the sarcomeres from each other
I.
J. area of only thick filaments
J.
K. cytoplasm of a muscle fiber
K.
L. composed of supporting proteins holding thick filaments together at the H zone
L.
M. synapse between a motor neuron and a muscle fiber
M.
14.  Match the following (some answers will have more than one answer):
A. has fibers joined by intercalated discs
A.
B. thick and thin filaments are not arranged as orderly sacromeres
B.
C. uses satellite cells to repair damaged muscle fibers
C.
D. striated
D.
E. contraction begins slowly but lasts for long periods
E.
F. has an extended contraction due to prolonged calcium delivery from both the sarcoplasmic reticulum and the interstitial fluid
F.
G. does not exhibit autorhythmicity
G.
H. uses pericytes to repair damaged muscle fibers
H.
I. uses troponin as a regulatory protein
I.
J. can be classified as single-unit or multiunit
J.
K. can be autorhythmic
K.
L. uses calmodulin as a regulatory protein
L.
15.  Match the following:
A. the smooth muscle action that allows the fibers to maintain their contractile function even when stretched
A.
B. a brief contraction of all the muscle fibers in a motor unit of a muscle in response to a single action potential in its motor neuron
B.
C. sustained contraction of a muscle, with no relaxation between stimuli
C.
D. larger contractions resulting from stimuli arriving at different times
D.
E. process of increasing the number of activated motor units
E.
F. contraction in which the muscle shortens
F.
G. inability of a muscle to maintain its strength of contration or tension during prolonged activity
G.
H. sustained, but wavering contraction with partial relaxation between stimuli
H.
I. produced by the continual involuntary activation of a small number of skeletal muscle motor units; results in firmness in skeletal muscle
I.
J. contraction in which muscle tension is generated without shortening of the muscle
J.
K. amount of oxygen needed to restore the body's metablolic conditions back to resting levels after exercise
K.
L. contraction in which a muscle lengthens
L.
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