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Muscular Physiology

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Chapter 12 - Kelly Neary - Human Physiology - Mission College

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  • October 4, 2022
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  • 2021/2022
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1.)
Repaying the oxygen debt requires replacing oxygen
that was ________.
a.)
Bound to blood hemoglobin and muscle myoglobin
b.)
Needed to metabolize lactic acid
c.)
Used for tissue warm up
d.)
All of the choices are correct
2.)
Excitation of the Golgi tendon organ normally causes
________.
a.)
Contraction of a muscle’s extrafusal fibers
b.)
Relaxation of a muscle’s extrafusal fibers
3.)
Which type of muscle fibers exhibits long lasting
but weak contractions?
a.)
Fast glycolytic
b.)
Fast oxidative-glycolytic
c.)
Slow oxidative
4.)
Long term muscle contraction (a few minutes or more)
is accomplished by ATP
from:
a.)
Creatine phosphate
b.)
Anaerobic respiration
c.)
Glycolysis
d.)
Aerobic respiration
5.)
Cardiac action potentials usually originate in ________
cells.
a.)
Purkinje
b.)
Chordae tendineae
c.)
Pacemaker
d.)
Septal
6.)
Which type of muscle tissue is characterized by fibers
that contain a moderate
amount of mitochondria and myoglobin?
a.)
Fast glycolytic
b.)
Fast oxidative-glycolytic
c.)
Slow oxidative 7.)
Which type of muscle fiber exhibits short but high force contractions?
a.)
Fast glycolytic
b.)
Fast oxidative-glycolytic
c.)
Slow oxidative
8.)
Muscle repair is due to ________ forming myotubes
that fuse to form new
muscle fibers.
a.)
Satellite cells
b.)
Myodribils
c.)
Muscle cells
d.)
All of the choices are correct
9.)
The regulatory protein of smooth muscle is:
a.)
Calmodulin
b.)
Troponin
c.)
Tropomyosin
d.)
Titin
10.)
Coactivation of alpha and gamma motor neurons is stimulated
by ________
neurons.
a.)
Upper motor
b.)
Lower motor
c.)
Intermotor
d.)
Sensory
11.)
The majority of calcium required for the sustained
contraction of smooth
muscle comes from the:
a.)
Sarcoplasmic reticulum
b.)
Extracellular fluid
12.)
The regulatory protein of cardiac muscle is:
a.)
Calmodulin
b.)
Troponin
c.)
Tropomyosin
d.)
Titin

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