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Question

Mast cells secrete:
a - Histamine
b - Serotonin
c - Heparin

A
Only a
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B
Only a and b
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C
Only c
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D
All a, b and c
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Solution

The correct option is D All a, b and c
Mast cells are found in mucous membranes and connective tissues and are important for wound healing and defense against pathogens via the inflammatory response. They secrete serotonin, heparin and histamine when they are activated in the presence of the toxic substance or pathogen.

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