Biology - Assignment Point

Biology

Hydrolysis

Hydrolysis Definition Hydrolysis is the breaking down of a chemical compound into two or more simpler compounds by reacting with water. The proteins, fats, and complex carbohydrates in food are broken down in the body by hydrolysis that is catalyzed by enzymes in the digestive tract. The term com.....

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Cofactor

Cofactor Definition Cofactor in biochemistry is a substance, such as a metallic ion or a coenzyme that must be associated with an enzyme for the enzyme to function. Cofactors work by changing the shape of an enzyme or by actually participating in the enzymatic reaction. Cofactor catabolism is sti.....

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T-Cell Receptor

T-Cell Receptor Definition T-cell receptor (TCR) is one of two polypeptide chains (a or ß) on the surface of T lymphocytes that recognize and bind foreign antigens. TCRs are antigen specific; their activity depends on antigen processing by macrophages or other antigen-presenting cells and the pr.....

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Cytotoxic T cell

Cytotoxic T Cell Definition Cytotoxic T cell is a type of immune cell that can kill certain cells, including foreign cells, cancer cells, and cells infected with a virus. It can be separated from other blood cells, grown in the laboratory, and then given to a patient to kill cancer cells. A cytot.....

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Natural Killer Cell

Natural Killer Cell Definition Natural killer cell is a cell that can react against and destroy another cell without prior sensitization to it. It is a small killer cell that destroys virus-infected cells or tumor cells without activation by an immune system cell or antibody. It is also known as .....

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Lymphocyte

Lymphocyte Definition Lymphocyte is any of various white blood cells, including B cells and T cells, that function in the body’s immune system by recognizing and deactivating specific foreign substances called antigens. The B cells make antibodies that attack bacteria and toxins while the T.....

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Plasma Cell

Plasma Cell Definition Plasma cell is a lymphocyte that originates from a B cell and produces antibodies as part of a humoral immune response. They are transported by the blood plasma and the lymphatic system. As with most cell types, plasma cells can mutate to give rise to cancer. Plasma cell ma.....

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Oral Mucosa

Oral Mucosa Definition Oral mucosa is a specialized type of tissue that lines the mouth. It is composed of highly-regenerative stratified epithelium and submucosal connective tissue, which demonstrate accelerated epithelial turnover and scarless wound healing when compared with epidermis. This ti.....

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Gastric Mucosa

Gastric Mucosa Definition Gastric mucosa is the mucous membrane layer of the stomach which contains the glands and the gastric pits. It consists of epithelium, lamina propria, and the muscularis mucosae. In its fresh state, it is of a pinkish tinge at the pyloric end and of a red or reddish-brown.....

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Mucous Membrane

Mucous Membrane Definition Mucous membrane is any of the membranes lining the passages of the body, such as the respiratory and digestive tracts, that open to the outside. Cells in the mucous membranes secrete mucus, which lubricates the membranes and protects against infection. It is mostly of e.....

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Vocal Folds

Vocal Folds Definition Vocal folds is The two folded pairs of membranes in the larynx (voice box) that vibrate when air that is exhaled passes through them, producing sound. It is also known commonly as vocal cords or voice reeds are composed of twin infoldings of mucous membrane stretched horizo.....

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About Neck

About Neck Defnition Neck is the part of an organism connecting the head with the rest of the body related adjectives cervical jugular. Also, any narrow or constricted part of a bone or organ that joins its parts as, for example, the neck of the femur bones. It contains blood vessels and nerves t.....

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