Question

Which of the following shapes of neutrophil helps them to engulf bacteria?
A. Spindle shape
B. Irregular shape
C. Comma shape
D. Round shape

Answer 1

Hint: Neutrophils are a kind of white blood cell. Most of the white blood cells that lead the immune system's response are neutrophils. There are four alternative kinds of white blood cells. Neutrophils are the foremost plentiful kind, creating up to fifty-five to seventy percent of your white blood cells.

Complete answer:
The neutrophil is the most present white blood cell in an exceedingly traditional blood smear, with concerning one neutrophil for each a thousand red blood cells. They're the smallest in size of the granulocytes. Neutrophils have a characteristic multilobed nucleus, with three to five lobes joined by slender strands of genetic material. The living substance of neutrophils contains varied purple granules referred to as azurophilic or primary granules that contain microbicidal agents. Neutrophils conjointly contain smaller, secondary granules that house lysozyme, gelatinase, collagenase, and plenty of alternative enzymes. Neutrophils are the foremost abundant granulocytes that makeup four-hundredth of white blood cells and an hour of the immune cells within the blood. Neutrophils are the primary responders to infection, and that they phagocytose microorganisms into phagosomes before hydrolyzing and destroying them. These cells conjointly secrete a variety of proteins that have antimicrobial effects similarly to tissue reworking potential. Neutrophils have a brief period and therefore destroy themselves throughout the degradation of foreign invaders. New neutrophils are then made incessantly within the bone marrow. The neutrophils of another universe, cager neutrophils, perform a transport operation of delivering foreign particles to the target site for the action of killer neutrophils. So, irregular shapes help more in supporting phagocytosis.
Hence, option B is the correct option.

Note: Neutrophils take away microorganisms and plant pathogens through a method called phagocytosis. Recognition of invasive microorganism pathogens is mediated by receptors present on the neutrophil surface, like PRRs (e.g., TLRs) and opsonic receptors, that acknowledge host proteins that are deposited on the microorganism surface.