In the second-messenger system, what serves as the first messenger?
A) cyclic AMP (cAMP)
B) DNA
C) ATP
D) the hormone
E) mRNA
Correct Answer:
Verified
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Q28: Which of the following disorders results from
Q29: A hormone produced by the heart, known
Q31: How would you classify a hormone that
Q32: Which system produces chemical messengers known as
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A) pancreas
B) thyroid gland
C)
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