Dictionary,Defintion,Meaning,What is Cell body-Perikaryon, Cell-Mediated Immunity, Cell cycle, Cell division, Cell Fusion

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Home >>Biology Dictionary >> Cell Body - Cell Mediated Immunity

Your Ad Here	Cell body (perikaryon). The part of neurone that contains the nucleus. The cell processes that are involved in the transmission of nervous impulses (the axon and the dendrites, respectively) develops as extensions from the cell body. Cell cycle. The cycle of changes concerned with replication during the life span of a cell, from the mitosis that gives it origin to the following mitosis that divides it into daughter cells. On the basis of DNA replication the cycle is divided into the G₂ phase, following mitosis, when the diploid quantity of DNA is present ; then the S phase, of a few hours, during which the quantity of DNA doubles (with replication of the chromosomes); then the G₂ phase (which may be substantially omitted) when the tetraploid quantity of DNA is present; and finally the M or mitotic phase. Many other biochemica events are correlated with the DNA cycle.
The total duration of the cell cycle is rarely less than 10 hours, except during cleavage; it may be much longer, and becomes indefinitely long when cells cease all divisions, such cells usually becoming arrested in Gi (or Go as it is sometimes called in these circumstances). Cell division. Division of cell, both cytoplasm and nucleus, is into two. The nucleus usually is divided by mitosis, occasionally by amitosis (q.v.), The cytoplasm divides by constriction in animals; by formation of a middle lamella across its equation in plants. Cell eating. It refers to ingestion of solid particles by the cell. Cell fusion. The fusion of two cells in tissue culture.
Cell-Mediated Immunity. Immunity to specific antigens. it is caused by T-lymphocytes. Responsible for rejection of homografts. Not known whether the specificity of the reaction is due to immunoglobulins on the lymphocytes. Cell-Membranes (plasmalemma: plasma membranes). The semipermeable membrane forming the outer limit of a cell. It consists mostly of protein and lipid. The membrane regulates the flow of materials in and out of the cell and plays a role in the production or assembly of the cell wall or capsule (when this is present). Cell-Plate (Bot.). Plate of differentially staining material which appears at telophase in the phragmoplast across the equatorial plane of the spindle. Believed to be forerunner of middle lamella.	Your Ad Here
Cell sap. A watery liquid contained in the vacuoles of plant cell which is usually hypertonic to the external medium. This causes the vacuoles to take in water by osmosis, maintaining turgor of the cells. Cell Strain. Cultivated variety of cell, usually of fibroblasts. Most strains, initially diploid, become aneuploid with prolonged culture. Cell theory. Theory, that all animals and plants are made up of cells and their products. Growth and reproduction are fundamentally due to division of cells. Cellular Pool. It refers to the collection of various type of molecules in a cell. Cellular totipotency. It refers to the ability of somatic cell of a plant to produce a new complete plant.

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Biology Dictionary - Part 3 Part 4 Cardinal Veins - Carotenoid Cartilage Bone(Replacing Bone) - Cataract Cell Body - Cell Mediated Immunity Centipide - Centriole Centrum - Cerebrospinal Fluid Chalaza - Chemotaxis Chloroplast - Chorda Mesoderm Chromatid - Chromosome Ciliary Feeding - Circadian Rhythm Cleidoic Egg - Clotting Factors Cobalamine - Coenzyme Collagen - Columella Auris Compensatory Hypertrophy - Compound Eye Coinferales - Connective Tissue Cork Phellem - Corpus Luteum Cranial Nerves - Cycadales Cymose - Cytotaxonomy

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