Tag: biology

Among the White blood cells (WBCs) four cells have the phagocytic ability. The neutrophils, monocytes, eosionophils and basophils. The basophils and the eosinophils have very less phagocytic ability when compared to the phagocytic ability of neutrophils and monocytes. When monocytes leave the blood and enter tissue spaces they grow and modify to form macrophages which still have the phagocytic ability. Thus, the correct option is B.

A macrophage is a type of phagocyte, which is a cell responsible for detecting, engulfing and destroying pathogens and apoptotic cells. Macrophages are produced through the differentiation of monocytes, which turn into macrophages when they leave the blood. Macrophages also play a role in alerting the immune system to the presence of invaders. Phagocytosis is the term used to describe the engulfing and destroying of defective or microbial cells. When inflammation occurs, monocytes undergo a series of changes to become macrophages and target cells that need eliminating. Once engulfed, cellular enzymes inside the macrophage destroy the ingested particle. Some macrophages act as scavengers, removing dead or necrotic cells while others provide host immunity by engulfing microbes.

An antibody also known as an immunoglobulin (Ig) is a large, Y-shaped protein molecule produced by B lymphocytes, that is used by the immune system to identify and neutralize pathogens (antigens) such as bacteria and viruses.

Phagocytosis is a process by which certain living cells called phagocytes ingest or engulf other cells or particles It is normally important in bacterial infections.

The cells involved in the immune system are white blood cells, or leukocytes, which destroy disease-causing organisms or substances. The two types of leukocytes are phagocytes and lymphocytes. The most common type of phagocyte is the neutrophil, which primarily fights bacteria. The two kinds of lymphocytes are B lymphocytes and T lymphocytes. Lymphocytes form in the bone marrow and either stay there and mature into B cells, or they leave for the thymus gland, where they mature into T cells.

Leucocytes or the white blood cells are the disease-fighting white blood cells that identify and eliminate pathogens. Hence, they are one of the chief components of the innate immune system. A high white blood cell count is referred to as leucocytosis. The innate leucocytes include phagocytes (macrophages, neutrophils and dendritic cells), mast cells, eosinophils and basophils.

Histiocytes destroy bacteria by phagocytosis. A histiocyte is an animal cell that is part of the mononuclear phagocyte system also known as the reticuloendothelial system or lymphoreticular system. The mononuclear phagocytic system is part of the organism's immune system. The histiocyte is a tissue macrophage or a dendritic cell.