Which category of signal exerts its effects on target cells by binding to membrane-bound receptor proteins?
A) neurohormones
B) estrogens
C) androgens
D) vitamin D
E) neurohormones, estrogens, androgens, and vitamin D
Answer: A
Which category of signal exerts its effects on target cells by binding to membrane-bound receptor proteins?
A) neurohormones
B) estrogens
C) androgens
D) vitamin D
E) neurohormones, estrogens, androgens, and vitamin D
Answer: A
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