Question

Histamine, serotonin and heparin are secreted by

Answer 1

hyy mate  here is your Answer:

Histamine, serotonin and heparin are secreted by basophils

Both basophils and mast cells contain secretory granules that store histamine and heparin, among other chemicals. Histamine release occurs in allergic reactions and in response to inflammation

Explanation:

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Answer 2

Answer:

Mast cells is a type of granular basophil cells in the connective tissue, that releases heparin, histamine and serotonin during inflammation and allergic reactions.