Histamine Has Receptors in the Hypothalamus, RAS System, Stomach, Blood

question 46

Multiple Choice

Histamine has receptors in the hypothalamus, RAS system, stomach, blood vessels, and bronchioles. What creates histamine's differing effects seen in each of these areas?

• A)Histamine recombines with other endogenous substances once inside the target cell.
• B)All of the effects are a result of membrane dehydration.
• C)Each tissue is different, so no two can have the same effect.
• D)They are dependent on which cell secretes the histamine.
• E)There are different message transduction systems.

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