Multiple Choice
The two major categories of extracellular signaling molecules that bind to cell surface receptors are ____.
A) peptide hormones and steroid hormones
B) steroid hormones and neurotransmitters
C) neurotransmitters and vitamins
D) growth hormones and vitamins
E) peptide hormones and neurotransmitters
Correct Answer:

Verified
Correct Answer:
Verified
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