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Muscular System Test Review
Test Description: This one will help you for the Ch. 8 Muscular System Test
Instructions: Answer all questions to get your test result.
1) Functions of muscle include ___________.
A
muscle tone
B
moving body parts
C
the heartbeat
D
all of the choices are correct
2) The amount of oxygen needed to support the conversion of lactic acid to glucose by the liver is called the ___________.
A
oxygen debt
B
lactate debt
C
aerobic conversion
D
refractory quantity
3) Neurotransmitter molecules are stored in vesicles within ___________.
A
motor neuron endings
B
myofibrils
C
motor units
D
sarcomeres
4) In a recording of a muscle twitch, the delay between the time a stimulus is applied and the time the muscle responds is called the _______________.
A
contraction period
B
latent period
C
relaxation period
D
recovery period
5) A motor unit typically includes _____________.
A
several motor neurons and one muscle fiber
B
muscle fibers only
C
one motor neuron and several muscle fibers
D
motor neurons only
6) The increase in the number of motor units activated as a result of more intense stimulation is called _________.
A
recruitment
B
threshold stimulation
C
latency
D
summation
7) Compared to skeletal muscle, smooth muscle ________.
A
contracts more rapidly and relaxes more slowly
B
contracts more slowly and relaxes more rapidly
C
contracts more rapidly and relaxes more rapidly
D
contracts more slowly and relaxes more slowly
8) Rigor mortis that occurs in skeletal muscles a few hours after death is due to ________.
A
lack of ATP increased membrane permeability to calcium ions
B
a decrease in the number of muscle fibers
C
excessive ATP decreased membrane permeability to calcium ions
D
persistent stimulation by motor neuron
9) Endomysium separates individual muscle fibers from each other.
A
False
B
True
10) The minimal strength of stimulation needed to elicit a muscle contraction is called the threshold stimulus.
A
True
B
False
*select an answer for all questions
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