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Question

Which of the following is a vasodilator?

A
Blubber
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B
Heparin
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C
Serotonin
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D
Histamine
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Solution

The correct option is D Histamine
Adipose tissues are subcutaneous (below the skin) fats. The cells of adipose tissues are called adipocytes. Blubber is a thick layer of adipose tissue found in aquatic mammals. It provides buoyancy, insulation, reserve source of food and water.
Histamine is a vasodilator (it dilates the blood vessels).
Serotonin is a vasoconstrictor (it constricts blood vessels).
Heparin is an anticoagulant.

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