Tag: immunity
Questions Related to immunity
Collecting of WBCs at the site of injury occurs due to
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Phagocytotis
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Hemolysis
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Diapedesis
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All of the above
Which of these are phagocytic in nature
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Neutrophil, monocyte and basophil
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Neutrophil, monocyte and macrophage
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Neutrophil, basophil and macrophage
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Acidophil, basophil and lymphocyte
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.
Heparin present normally in blood is formed by
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Granulocytes
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Clumped platelets
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Mast cell granules
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Monocytes
What is the name given to a large amoeboid cell that engulfs and destroys bacteria invading the human body?
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Elastocyte
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Mast cell
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Macrophage
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T-cell
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.
Antibodies are produced by
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Lymph nodes
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B lymphocytes
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Spleen
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Liver
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
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Is carried by cells of the adaptive immune system
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Is restricted to macrophages
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Is important in bacterial infections
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Is a process that does not involve energy
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.
When human body is infected by infection ______________ type of cells are activated to defend the body.
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erythrocytes
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leukocytes
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lymphocytes
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monocytes
The blood cells which destroy disease causing germs are
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RBCs
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WBCs
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Platelets
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Haemoglobin
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.
Chief components of the immune system are
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Eythrocytes
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Thrombocytes
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Leucocytes
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All of the above
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.
Which of the following biotechnological product can enhance the immune system?
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IL-2
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GM-CSF
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TNF
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All of the above
Interleukin 2 (IL-2) is an interleukin, a type of signaling molecule that regulates the activities of white blood cells (leukocytes, often lymphocytes) that are responsible for immunity. Granulocyte-macrophage colony-stimulating factor (GM-CSF), also known as colony-stimulating factor 2 (CSF2), a monomeric glycoprotein secreted by macrophages, T cells, mast cells, NK cells, endothelial cells and fibroblasts that function as a cytokine - a white blood cell growth factor and stimulate stem cells to produce granulocytes (neutrophils, eosinophils, and basophils) and monocytes. Monocytes exit the circulation and migrate into tissue, whereupon they mature into macrophages and dendritic cells. Thus, it is part of the immune system. Tumor necrosis factor (TNF) is a cell signaling protein (cytokine) involved in systemic inflammation and is one of the cytokines that make up the acute phase reaction. It is produced chiefly by activated macrophages. The primary role of TNF is in the regulation of immune cells. Thus, the correct answer is option D.