Category: I
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Intramuscular
Within or into muscle. Inside a muscle an intramuscular injection. A method of administration of medication or nourishment, in which an injection is given into a patient’s muscle. A medical term referring to “inside a muscle,” such as in the case of an intramuscular injection, where a medication is injected deeply into a muscle.
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Intracellular membranes
Membranes of subcellular structures.
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Intracellular
Inside a cell. Within a cell or cells.
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Intestine
A long, tube-shaped organ in the abdomen that completes the process of digestion. There is both a large intestine and a small intestine. Also called the bowel. The gastrointestinal tract; more specifically the part after the stomach, i.e. the small intestine (duodenum, jejunum, and ileum) where the greater part of digestion and absorption take place,…
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Intestinal
Having to do with the intestines.
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Interphase
The interval between two successive cell divisions during which the chromosomes are not individually distinguishable and DNA replication occurs. The stage between the time one mitosis takes place and the beginning of the next mitotic division. A stage of a cell between divisions. The period when a cell is not undergoing division (mitosis), during which…
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Internal radiation
A procedure in which radioactive material sealed in needles, seeds, wires, or catheters is placed directly into or near the tumor. Also called brachytherapy, implant radiation, or interstitial radiation therapy. The implantation of a radioactive substance into the body for treating a disease, e.g., cancer.
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Internal medicine
A medical specialty concerned with the diagnosis and treatment of diseases of the internal organ systems of adults. A medical specialty concerned with the diagnosis and treatment (including surgery) of diseases of the internal organs, e.g., liver, lungs, and heart. Internists are diagnosticians, personal physicians for adult medical care, health counselors, and consultants to other…
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Intermittent
Occurring at separated intervals; having periods of cessation of activity. A term applied to fevers which continue for a time, subside completely and then return again. The name is also used in connection with a pulse in which occasional heartbeats are not felt, in consequence of irregular action of the heart. Suspending activity at intervals;…
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Interleukin-12 (IL-12)
A heterodimeric cytokine that stimulates the production of interferon gamma from T-cells and natural killer cells, and also induces differentiation of Th1 helper cells. It is an initiator of cell-mediated immunity. A cytokine (glycoprotein) produced by the body, which serves to activate the immune system against certain tumors and pathogens.