4. _______ are branched, mobile APCs found in epidermis, mucous membranes, and l

Question

4. _______ are branched, mobile APCs found in epidermis, mucous membranes, and lymphatic organs; They alert immune system to pathogens

Question 4 options:

macrophages

B lymphocytes

reticular cells

dendritic cells

5. _____is one result of complement which leads to a hole forming on the target cell

Question 5 options:

Membrane attack complex

apoptosis

opsinization

inflammation

6. the adhesion of leukocytes to the vesel wall during inflammation is called

Question 6 options:

diapedesis

extravasated

exocytosis

margination

macrophages

B lymphocytes

reticular cells

dendritic cells

Explanation / Answer

Answer 4.

APCs refer to antigen presenting cells. There are various types of APCs like dendritic cells, macrophages, B cells etc. Out of these, dendritic cells are branched and are present in the epidermis.

So, the correct answer is dendritic cells.

Answer 5.

The complement has three functions: Opsonization, membrane attack complex formation and chemo-attraction.

Among the three functions hole-formation occurs in the membrane attack complex. So, the correct answer is ‘membrane attack complex’.

Answer 6.

The leucocytes mechanically attach to the endothelial lining of post-capillary venules. This process is known as margination.

So, the correct answer is ‘margination’.

Note that extravasation is leakage of fluid out of the blood vessels. On the other hand, diapedesis involves passage of blood cells through the capillary walls; this involves inflammation.

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