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A&P CHAPTER 9 - UTA 2457 DR.
HENRY 2026 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
A motor unit has a ____________ _____________ and the
muscle fibers it stimulates. - correct answer-motor neuron
1 motor neuron is in contact with about ___________ muscle
fibers. The strength of a motor unit depends on the _________
and ___________ of fibers. - correct answer-150, size, number
The _____________ period of a twitch contraction is the brief
delay between the _____________ and the contraction. The
action potential crosses the ______________ and
_______________ is released from the SR. - correct answer-
latent, stimulus, sarcolemma, calcium
The _____________________ period of a twitch contraction is
when the calcium binds with the ____________, the myosin
_____________ sites are exposed, and ______________-
_____________ forms. - correct answer-contraction, troponin,
binding, cross-bridging
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The _________________ period of a twitch contraction is when
_______________ is absorbed back into the SR, the
_______________ detaches from the actin and
_______________ covers the actin. - correct answer-
relaxation, calcium, myosin, tropomyosin
The ______________ period of a twitch contraction is when the
muscle ______________ and cannot respond to another action
potential. - correct answer-refractory, contracts
The 3 types of contractions are
_____________,_______________, and _____________. -
correct answer-isotonic, isometric, eccentric
An _________________ contraction is when the ___________
remains constant and the body part moves up. - correct
answer-isotonic, tension
An _____________ contraction is when you keep a body part
steady. - correct answer-isometric
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An ________________ contraction is when you move a body
part down. - correct answer-eccentric
Red muscle fiber is _______ twitch. It is _____________ in
myoglobin, has a lot of mitochondria and
___________________. - correct answer-slow, high, capillaries
White muscle fiber is ________ twitch. It is _____________ in
myoglobin and lighter in color. - correct answer-fast, low
______________ _________________ muscle fibers are the
smallest, least powerful and ____________ in color. They use
_______________ cellular respiration, are resistant to
_______________, and are used for endurance and
maintaining _________________. - correct answer-slow
oxidative, red, aerobic, fatigue, posture
____________ ______________ muscle fibers are the largest,
most powerful, and ____________ in color. They use
_______________ cellular respiration, are quick to
_______________, and are used for throwing or __________
_____________. - correct answer-fast glycolytic, white,
anaerobic, fatigue, weight lifting
A&P CHAPTER 9 - UTA 2457 DR.
HENRY 2026 ACTUAL QUESTIONS
WITH VERIFIED ANSWERS.
A motor unit has a ____________ _____________ and the
muscle fibers it stimulates. - correct answer-motor neuron
1 motor neuron is in contact with about ___________ muscle
fibers. The strength of a motor unit depends on the _________
and ___________ of fibers. - correct answer-150, size, number
The _____________ period of a twitch contraction is the brief
delay between the _____________ and the contraction. The
action potential crosses the ______________ and
_______________ is released from the SR. - correct answer-
latent, stimulus, sarcolemma, calcium
The _____________________ period of a twitch contraction is
when the calcium binds with the ____________, the myosin
_____________ sites are exposed, and ______________-
_____________ forms. - correct answer-contraction, troponin,
binding, cross-bridging
, Page | 2
The _________________ period of a twitch contraction is when
_______________ is absorbed back into the SR, the
_______________ detaches from the actin and
_______________ covers the actin. - correct answer-
relaxation, calcium, myosin, tropomyosin
The ______________ period of a twitch contraction is when the
muscle ______________ and cannot respond to another action
potential. - correct answer-refractory, contracts
The 3 types of contractions are
_____________,_______________, and _____________. -
correct answer-isotonic, isometric, eccentric
An _________________ contraction is when the ___________
remains constant and the body part moves up. - correct
answer-isotonic, tension
An _____________ contraction is when you keep a body part
steady. - correct answer-isometric
, Page | 3
An ________________ contraction is when you move a body
part down. - correct answer-eccentric
Red muscle fiber is _______ twitch. It is _____________ in
myoglobin, has a lot of mitochondria and
___________________. - correct answer-slow, high, capillaries
White muscle fiber is ________ twitch. It is _____________ in
myoglobin and lighter in color. - correct answer-fast, low
______________ _________________ muscle fibers are the
smallest, least powerful and ____________ in color. They use
_______________ cellular respiration, are resistant to
_______________, and are used for endurance and
maintaining _________________. - correct answer-slow
oxidative, red, aerobic, fatigue, posture
____________ ______________ muscle fibers are the largest,
most powerful, and ____________ in color. They use
_______________ cellular respiration, are quick to
_______________, and are used for throwing or __________
_____________. - correct answer-fast glycolytic, white,
anaerobic, fatigue, weight lifting
