Question

What is diapedesis?
A. Immune response of T cells
B. Synthesis of WBC
C. Squeezing movement of WBC at the site of infection
D. Synthesis of RBC

Answer 1

Various types of leukocytes are present in the body like neutrophils that fight against infections, basophils. They form the body's immune response, eosinophils; defend against the parasitic infection. Monocytes remove foreign and dead cells from our body. Lymphocytes make the defence system of the body.

Complete answer:
Leukocytes are the white blood cells, which are less in number than the red blood cells. They are slightly greater than the erythrocytes in size. They are the immunity cells having phagocytic properties. They produce antibodies and fight against foreign cells. They inhibit the inflammatory process as they are defence cells.

Option A: Immune response of T cells: It forms the immune reaction. They are activated by cytokines. They bind to kill infected cells.

Option B: Synthesis of WBC: The synthesis of WBC comes under the Haematopoiesis process.

Option C: Squeezing movement of WBC at the site of infection: The movement of WBC via narrow capillaries into body tissue is diapedesis. It is a response to inflammation caused in the tissue of injury.

Option D: Synthesis of RBC: This process is called erythropoiesis. It occurs in the bone marrow.

So the answer is option C: Squeezing movement of WBC at the site of infection.

Note:
Erythrocytes – These are the red blood cells which have the haemoglobin in them. It gives a blood-red colour. They are small, biconcave cells which become thick at the circumference. These shapes will make them flexible and elastic to pass through various vessels especially capillaries to diffuse the gases. The main function is to transport oxygen to the body.