Multiple choice

Lymphocytes are an important part of the immune system. Which of the following specialised cell types are involved in the entry of lymphocytes into the lymph nodes?

  1. M-cells

  2. Mesangial cells

  3. PALS

  4. HEV endothelial cells

  5. Selectins

Reveal answer Fill a bubble to check yourself
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.