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Introduction to Cell Mediated Immunity

Mast cells of...

Question

Mast cells of connective tissue release

A

Vasopressin and histamine

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B

Heparin and histamine

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C

Heparin and calcitonin

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D

Serotonin and melanin

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Solution

The correct option is B Heparin and histamine
A mast cell is derived from the myeloid stem cell and contains many granules rich in histamine and heparin. Mast cells play an important role in allergy and anaphylaxis and are involved in wound healing and defence against pathogens. So, the correct answer is option B.

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Q. Which of the connective tissue contains fibroblasts, macrophages and mast cells?

Q. A biologist found a blood cell which is similar to the mast cell of connective tissue which contains anticoagulant and vasodilator (histamine). Identify the blood cell.

Q. Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled I, II, III and IV and select the right option about them.

	I	II	III	IV
(A)	Macrophage	Collagen fibres	Fibroblast	Mast cell
(B)	Mast cell	Collagen fibres	Fibroblast	Macrophage
(C)	Macrophage	Fibroblast	Collagen fibres	Mast cell
(D)	Mast cell	Macrophage	Fibroblast	Collagen fibres

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A Fibroblasts
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Introduction to Cell Mediated Immunity

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