A lymphocyte is a type of white blood cell that is part of the immune system. Which among the following specialised cell types is involved in the entry of lymphocytes into lymph nodes of the body?
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M-cells
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Mesangial cells
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PALS
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HEV endothelial cells
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Selectins
D
Correct answer
Explanation
The high-walled endothelium of the post-capillary venules (HEV) in lymph nodes express vascular addressins, which are recognised by homing receptors on lymphocytes passing through the afferent lymphatics and which mediate entry of the lymphocytes into the lymph nodes.