BSC 2087 - Human Anatomy and Physiology » Spring 2022 » Check Yourself 7

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Question #1
If you weigh 160 pounds, about how much weight is muscle?
A.   50 pounds
B.   70 pounds
C.   90 pounds
D.   30 pounds
Question #2
Intercalated disks are found on the ___ muscle.
A.   striated
B.   nonstriated involuntary
C.   nonstriated voluntary
D.   cardiac
Question #3
The characteristic of a muscle to be stretched is known as
A.   excitability.
B.   extensibility.
C.   contractility.
D.   elasticity.
Question #4
Muscles that produce movement in a single direction are
A.   antagonists.
B.   synergists.
C.   prime movers.
D.   obliques.
Question #5
A motor unit is a motor neuron (nerve cell) plus ___ of the muscle fibers it stimulates.
A.   all
B.   three-fourths
C.   one-half
D.   one-third
Question #6
During a muscle contraction, the muscle cell membrane becomes temporarily permeable to
A.   calcium.
B.   ATP.
C.   acetylcholine.
D.   sodium.
Question #7
Muscles are named in a variety of ways; the muscles on the sides of the head are named according to their
A.   location of insertion.
B.   action.
C.   size.
D.   location.
Question #8
The muscles that make up the hamstrings are the
A.   gluteus maximus, semitendinosus, and biceps femoris.
B.   semitendinosus, biceps femoris, and semimembranosus.
C.   semitendinosus, biceps femoris, and adductor magnus.
D.   semitendinosus, gracilis, and semimembranosus.
Question #9
A single muscle contraction is called a(n)
A.   impulse.
B.   spasm.
C.   twitch.
D.   all or none law.
Question #10
A ___ is a tear in the muscle.
A.   fracture
B.   spasm
C.   strain
D.   sprain

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