Question

Name of cells which help in clotting of blood in mammals_______.
A. Platelets
B. Thrombocytes
C. Lymphocytes
D. Monocytes

Answer 1

Hint: Coagulation, otherwise called clotting is the cycle by which blood changes from a fluid to a gel, framing blood coagulation. It is because of coagulation that a clot is formed when there is the flow of blood when we get injured. They produce proteins which help to coagulate.

Complete answer: Platelets, additionally called thrombocytes are non nucleated blood cells that are significant in the development of blood clumps (coagulation). Platelets are discovered distinctly in the blood of mammals. Platelets are cells that have no cell nucleus. It is produced from megakaryocytes and is the fragments of cytoplasm. Platelets produce an enzyme called thrombokinase at the site of injury, which in turn initiates the formation of another enzyme called prothrombinase as a result of which a cascade of reactions occur and form a mesh-like network called fibrin, which helps in the coagulation mechanism. Red platelets make up about 40% of our complete blood volume.
a) A lymphocyte is a kind of white blood cell that is important for the resistant framework. There are two principal kinds of lymphocytes: B cells and T cells. The B cells produce antibodies that are utilized to assault attacking microorganisms, infections, and toxins.
b) Bone marrow produces monocytes and delivers them into the circulatory system. When they arrive at tissues in the body, they're called macrophages. There, they separate and eat up germs and other destructive microorganisms. They likewise dispose of dead cells and aid the insusceptible reaction.
Hence, option A is the correct answer.

Note: Low platelet concentration is called thrombocytopenia and is due to either decreased production or increased destruction. Elevated platelet concentration is called thrombocytosis, and is either congenital or reactive.