____ is an exocrine gland.
A) The kidney
B) The thyroid
C) An ovary
D) The pancreas
Correct Answer:
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Q55: Communication between neurons is achieved by
A) hormones.
B)
Q56: Hormone messages are received by
A) neurotransmitters.
B) receptor
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
Q61: Balance is maintained by
A) the tympanum.
B) ear
Q62: Skeletal muscle contractions are under the control
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
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