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Tubal ligation
Tubal ligation Surgical sterilization procedure in which the fallopian tubes are sealed or cut to prevent sperm from reaching an egg.
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Sterilization
A surgical method, such as tubal ligation for women and vasectomy for men, that renders an individual unable to reproduce.
Sperm
A sperm cell, or spermatozoon (pl. spermatozoa) (in Greek: sperm = semen and zoon = alive), is the haploid cell that is the male gamete. It is carried in fluid called semen, and is capable of fertilising an egg cell to form a zygote. A zygote can grow into a new organism, such as a human. Sperm cells contain half of the genetic information needed to create life. Generally, the sex of the offspring is determined by the sperm, through the chromosomal pair "XX" (for a female) or "XY" (for a male).
Egg
The mature female reproductive cell.
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Tricuspid valve
The heart valve that controls blood flow from the right atrium into the right ventricle.
Trigger point
Hypersensitive area or site in muscle or connective tissue, usually associated with myofascial pain syndromes.
Triglyceride
A fat-like substance found in the blood.
Triple-therapy
A combination of three medicines used to treat Helicobacter pylori infection and ulcers. Drugs that stop the body from making acid are often added to relieve symptoms.
Tropical sprue
A condition of unknown cause. Abnormalities in the lining of the small intestine prevent the body from absorbing food normally.
Tubal ligation
Tube feeding
A way to provide food through a tube placed in the nose, the stomach, or the small intestine. A tube in the nose is called a nasogastric or nasoenteral tube. A tube that goes through the skin into the stomach is called a gastrostomy or percutaneous endoscopic gastrostomy (PEG). A tube into the small intestine is called a jejunostomy or percutaneous endoscopic jejunostomy (PEJ) tube. Also called enteral nutrition.
Tyrosine
The amino acid from which dopamine is made.
Telomerase
An enzyme composed of a catalytic protein component and an RNA template and that synthesizes the telomeric DNA at the ends of chromosomes. When active, telomerase can continually add to the length of the telomeres on the ends of chromosomes within a cell, thus conferring on that cell the ability to continue dividing past its normal lifespan.
Telomeres
"Caps" (made of repeated DNA sequences) found at the ends of chromosomes that protect the ends of the chromosomes from degradation. The telomeres on a chromosome shorten with each round of cell replication. Telomere shortening has been suggested to be a "clock" that regulates how many times an individual cell can divide (that is, when the telomeres of the chromosomes in a cell shorten past a particular point, the cell can no longer divide).
Tissue culture
See culture.
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