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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Definitions:

Modified Leaves

Leaves that have undergone changes to perform specialized functions beyond photosynthesis, such as tendrils for climbing or spines for protection.

Circumference

Circumference is the linear distance around the edge of a circle or circular object.

Apical Meristems

Regions at the tips of plant roots and shoots where cells actively divide, leading to growth.

Lateral Meristems

Plant tissue responsible for growth in thickness or girth in a maturing plant, located in stems and roots.