Skeletal muscle contractions are under the control of
A) exocrine glands.
B) the endocrine system.
C) the endocrine and exocrine systems.
D) the nervous system.
Correct Answer:
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Q57: Acetylcholine is a
A) neurotransmitter.
B) hormone.
C) synthetic drug.
D)
Q58: The fovea centralis has the highest concentration
Q59: Pitch is determined by
A) frequency of the
Q60: _ is an exocrine gland.
A) The kidney
B)
Q61: Balance is maintained by
A) the tympanum.
B) ear
Q63: Thick protein filaments in muscle contain
A) actin.
B)
Q64: Muscle contractions are partially regulated by
A) the
Q65: The _ is not part of the
Q66: When the nerve impulse reaches the end
Q67: The part of the brain that controls
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