T cells belong to a group of white blood cells known as lymphocytes, and play a central role in cell-mediated immunity.
Dictionary » H » Host cell
Host cell
Definition
noun, plural: host cells ...
Plant Cell Wall
One of the most important distinguishing features of plant cells is the presence of a cell wall.
CD8+ T cells
The best understood CD8+ T cells are cytotoxic T lymphocytes (CTLs). They secrete molecules that destroy the cell to which they have bound.
Helper T cell
A helper (or TH) T cell is a T cell (a type of white blood cell) which has on its surface antigen receptors that can bind to fragments of antigens displayed by the Class II MHC molecules found on professional ...
T cell
A type of lymphocyte responsible for cell-mediated immunity that differentiates under the influence of the thymus.
taiga ...
T cells The type of lymphocyte responsible for cell-mediated immunity; also protects against infection by parasites, fungi, and protozoans and can kill cancerous cells; circulate in the blood and become associated with lymph nodes and the spleen.
killer T cells See cytoxic T cells.
kilocalorie The energy needed to heat 1000 grams of water from 14.5 to 15.5 degrees C.
Helper T Cell Stimulating B Cell
When a T lymphocyte "sees" the same peptide on the macrophage and on the B cell, the T cell stimulates the B cell to turn on antibody production.
...
Helper T cells T cells that stimulate the proliferation of specific B lymphocytes and cytotoxic T cells.
T cell A type of lymphocyte derived from bone marrow stem cells that matures into an immunologically competent cell under the influence of the thymus. T cells are involved in a variety of cell-mediated immune reactions; also known as a T lymphocyte.
Helper T cells also stimulate the production of antibodies. Chemical signals from helper T cells stimulate the production of B cells specific to an infecting pathogen, and then stimulate the B cells to differentiate into plasma cells.
Helper T cells which stimulate B cell clonal selection
D.
Granulocytes which invade areas of virus production ...
The host cell wall to ruptures releasing the newly formed viruses.
Upon entering the cell, the viral DNA may instead, become integrated into the bacterial DNA. It is replicated along with the host DNA when the host reproduces.
The first cell structure we will explore is the cell wall. Found only in plant cells, the cell wall provides the cell with additional strength. Cell walls are thick walls built around the cell. These walls are made from cellulose.
a predominant cell type in connective tissue
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row
...
An area in a plant cell that contains chlorophyll and is the location of photosynthesis and starch formation.
Chorionic villus sampling ...
Antibiotics inhibit cell wall formation
Antibiotics inhibit DNA replication
Antibiotics inhibit protein synthesis
Stationary Phase → reduced growth rate ...
Human Genetic Mutant Cell Repository of the National Institute of General Medical Sciences, founded in 1972;
Aging Cell Repository of the National Institute on Aging, created in 1974; and ...
To increase the number of copies of a DNA sequence, in vivo by inserting into a cloning vector that replicates within a host cell, or in vitro by polymerase chain reaction (PCR). Anaerobe. An organism that grows in the absence of oxygen. See Aerobe.
Somatic mutation -- a mutation occurring in any cell that is not destined to become a germ cell; if the mutant cell continues to divide, ...
Artificial chromosomeA vector constructed from host cell chromosomal elements such as origin of replication, telomeres and centromere (in eukaryotes).
A stem cell is a specific type of cell in the body that has the potential to form many different cell types.
That cell divided repeatedly by mitosis to eventually form the trillion cells that make up your body. Inside each cell is a nucleus which contains the chromosomes.
The most frequent process of nuclear division (karyokinesis) in cells that produces daughter cells that are genetically identical to each other and to the parent cell.
Virus A noncellular biological entity that can reproduce only within a host cell. Viruses consist of nucleic acid covered by protein; some animal viruses are also surrounded by membrane.
AIDS occurs when lymphocytes, particularly CD4+ T cells are killed off, leaving the patient unable to fight off opportunistic infections. The HIV virus has to attach to molecules that are expressed on the surface of the T-cells.
A cell wall is not a fortress around the delicate plant cell. There are small holes in the wall that let nutrients, waste, and ions pass through. Those holes are called plasmodesmata. These holes have a problem: water can also be lost.
Within an appropriate host cell, the viral genome is replicated and uses cellular systems to direct the synthesis of other viral components. Progeny viruses are formed by de novo assembly from the newly synthesized components within the host cell.
The process of indirect cell division is characterized by a series of complex changes in the nucleus, leading to its subdivision; this is followed by cleavage of the cell protoplasm.
melanocyte - pigment cell. In the vertebrates, melanocytes are derived from neural crest, migrate dorsolaterally as melanoblasts to reside in the basal layer of the epidermis.
Condition in which an individual harbors 2 or more genetically distinct cell lines; results from a genetic change after formation of a zygote, ie postzygotic event. Cf. germ line mosaicism.
Related Terms:
Zygote ...
For bacteria and yeasts, transformation refers to the techniques of introducing plasmid or other vectors into a host cell.
Allorecognition: Recognition by T cells of the MHC molecules on an allogeneic individual's antigen-presenting cells, which results in allograft rejection in vivo and mixed lymphocyte reaction (MLR) in vitro.
interaction between a molecule (usually of an extracellular origin) and a protein on or within a target cell. One type of ligand-receptor interaction can be between steroid hormones and their cytoplasmic or nuclear receptors.
A particle consisting of a nucleic acid (RNA or DNA) genome surrounded by a protein coat (capsid) and sometimes also a membrane, which can replicate only after infecting a host cell.
viruses - obligate intracellular parasites that require the host cell's biochemical machinery to drive protein synthesis and metabolize sugars.
cell cycle - the progression of a parent cell from creation through growth and development through DNA synthesis to cellular division to produce to daughter cells.
-the process by which more than one gene is introducedinto a cell, so that the host cell will eventually express more than one new trait.
Genetic code
- The way genetic information is stored in living organisms.
Virus An infectious agent composed of proteins and genetic material (either DNA or RNA) that requires a host cell, such as a plant, animal, or bacterium, in which to reproduce.
Lytic. A phase of the virus life cycle during which the vi- rus replicates within the host cell, releasing a new generation of viruses when the infected cell lyses.
M
Malignant. Having the properties of cancerous growth.
Complete infective form of a virus outside a host cell, with RNA core and a capsid ...
Meiosis: the process of cell division in which a single cell produces four daughter cells each of which contains half of the number of chromosomes of the parent cell.
The idea is to make a transgenic mouse with a toxin gene (often diphtheria toxin) under control of a specialized promoter which activates only in the target cell type.
[Gr. mitos - thread]. The process of nuclear division forming two daughter nuclei each having the identical complement of chromosomes as the parent cell.
For example, what is learned about the physiology of yeast cell can also apply to human cells. The field of animal physiology extends the tools and methods of human physiology to non-human animal species.
 See also: Cell, Cells, Protein, Trans, Organ
  
|
RSS
