Question

Collecting of WBCs at the site of injury occurs due to
A. Phagocytosis
B. Hemolysis
C. Diapedesis
D. All of the above

Answer 1

WBCs are the cells of the immune system which protect the body against infectious diseases and foreign invaders. They are found in the blood as well as the lymphatic system.

Complete step by step answer:
To solve this question we must know about the action of WBC at the site of injury.
WBCs or lymphocytes are the cells which protect our body against the foreign invaders. They are of 5 types -neutrophil, eosinophil, basophil, lymphocytes and monocytes.
At the site of injury, the WBC and other cells move out of small arterioles, venules or capillaries. This movement of the cells through the capillary wall to fight against the foreign microorganism is called diapedesis. After the movement of the WBC the cells of WBC either engulfs the particle or secrete antibodies in response to the foreign particles.
Phagocytosis is the process by which the cell engulfs a particle and secretes digestive enzymes to digest it.
Hemolysis is the process of RBC rupture due to which the cells release its content to the fluid surrounding.

The correct answer is (C). Collecting of WBC at the site of injury occurs due to diapedesis.

Additional information:
Cell counting of blood can be obtained by CBC method. High count of WBC indicates the body is fighting against infection.

Note:
Diapedesis is an innate immune response. The inflammatory response by the body is to maintain homeostasis. The defence cells of the body move at the site of injury and cause inflammatory responses.