After a steroid hormone binds to its receptor to form an active complex,

A) adenylyl cyclase is activated.
B) cAMP is formed.
C) G proteins are phosphorylated.
D) gene transcription is initiated.
E) ion channels are opened.


Answer: D

Anatomy & Physiology

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The ________ of the stomach and intestine secrete histamine and serotonin.

A. chief cells B. parietal cells C. enterochromaffin-like (ECL) cells D. G cells

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