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Which of the following chemical mediators is secreted onto the surface of the skin?

a) Insulin
b) Melatonin
c) Histamine
d) Serotonin

User Tempy
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1 Answer

4 votes

Final answer:

Histamine is the chemical mediator that is secreted onto the surface of the skin. It is released by mast cells in response to irritants or allergic reactions, and it plays a role in dilation of blood vessels, itching, and inflammation.

Step-by-step explanation:

The correct answer is c) Histamine.

Histamine is a chemical mediator that is secreted onto the surface of the skin. It is released by mast cells in response to irritants or allergic reactions, and it plays a role in dilation of blood vessels, itching, and inflammation.

Insulin is a hormone produced by the pancreas that helps regulate blood sugar levels. Melatonin is a hormone that regulates sleep and wake cycles. Serotonin is a neurotransmitter that affects mood, appetite, and many other functions in the body. These substances are not secreted onto the surface of the skin.

User SerialEnabler
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