Question

What is the movement of the neutrophil toward a chemical substance called?

A)Emigration B) leukocytosis C) diapedesis D) margination E) chemotaxis

Answer 1

E) Chemotaxis

Neurophils are highly motile in nature, and it travels quickly towards the site of infection in tissue. This movement occurs due to the attraction towards the chemical substance such as released cytokines by activated macrophages,mast cells and endothelial cells,thus this process is known as chemotaxis. As a result of that ,there will be amplification of the inflammatory reactions at the site of infection.

Emigration is the movement of neutrophils from blood in postcapillary and large venule to the site of infection and causes inflammation. Leuckocytosis also causes the inflammation by increasing the number of white blood cells.Diapedesis is the movement of leukocyte from bloodstream to the site of infection causes inflammation then moves to lymphatic compartment for recycling. Margination causes dilation of blood capillaries thus blood flow becomes slow and leukocytes adhere to the endothelial lining of vessels , occurs at early phase of inflammation.