Antagonist
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  Antagonist



Antagonist

   "In biochemistry, an antagonist acts against and blocks an action. For example, insulin lowers the level of glucose (sugar) in the blood, whereas another hormone called glucagon raises it; therefore, insulin and glucagon are antagonists. An antagonist is the opposite of an agonist which stimulates an action. Antagonists and agonists are key players in pharmacology and in the chemistry of the human body."

RELATED TERMS
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Biochemistry
The chemistry of biology, the application of the tools and concepts of chemistry to living systems.

Antagonist
"In biochemistry, an antagonist acts against and blocks an action. For example, insulin lowers the level of glucose (sugar) in the blood, whereas another hormone called glucagon raises it; therefore, insulin and glucagon are antagonists. An antagonist is the opposite of an agonist which stimulates an action. Antagonists and agonists are key players in pharmacology and in the chemistry of the human body."

Insulin
The hormone that drives incoming nutrients into cells for storage. Excess insulin is the primary pillar of aging.

Glucose
The only simple carbohydrate that circulates in the bloodstream. Glucose is the primary fuel used by the brain. It can also be stored in the liver and muscles in a polymer form known as glycogen.

Blood
The life-maintaining fluid which is made up of plasma, red blood cells (erythrocytes), white blood cells (leukocytes), and platelets; blood circulates through the body's heart, arteries, veins, and capillaries; it carries away waste matter and carbon dioxide, and brings nourishment, electrolytes, hormones, vitamins, antibodies, heat, and oxygen to the tissues.

Hormone
A chemical substance formed in the body that is carried in the bloodstream to affect another part of the body; an example is thyroid hormone, produced by the thyroid gland in the neck, which affects growth, temperature regulation, metabolic rate, and other body functions.

Glucagon
The hormone from the pancreas that causes the release of stored carbohydrate in the liver to restore blood glucose levels. Glucagon uses the second messenger cyclic AMP to exert its biological action.

Agonist
Drug that increases neurotransmitter activity by stimulating the dopamine receptors directly.

Pharmacology
The science that deals with the characteristics, effects, and uses of drugs and their interactions with living organisms.



SIMILAR TERMS
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Antabuse
A trade name for disulfuram, effective in the treatment of alcoholism as it produces aversive symptoms when combined with alcohol.

Antacids
Medicines that balance acids and gas in the stomach.

Antagon
Antagon or Ganirelix is used to inhibit premature ovulation in women undergoing fertility procedures. This medicine prevents premature luteinizing hormone (LH) surges in women undergoing the fertility procedure of controlled ovarian hyperstimulation. LH is involved in ovulation, which is the development of eggs in the ovaries. Ganirelix may help reduce the need for follicle-stimulating hormone, which is also involved in ovulation.

Antagonate
Antagonate is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): chlorpheniramine maleate.

Antagonist medication
A chemical entity that is not naturally occuring within the body which occupies a receptor, produces no physiologic effects, and prevents endogenous and exogenous chemicals from producing an effect on that receptor.

Antakya doctors
All doctors near Antakya, Turkey. Doctors who can assist a patient in Antakya.

Antalgic gait
Gait in which patient reduces weight-bearing on painful joint or limb. (Pain-avoiding gait).

Antalya doctors
All doctors near Antalya, Turkey. Doctors who can assist a patient in Antalya.

Antananarivo doctors
All doctors near Antananarivo, Madagascar. Doctors who can assist a patient in Antananarivo.

Antara (micronized
Antara micronized is a prescription or over-the-counter drug which is (or once was) legal in the United States and possibly in other countries. Active ingredient(s): fenofibrate.



PREVIOUS AND NEXT TERMS
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Anovular
Not accompanied by ovulation, the release of an ovum (egg) from the ovary. Synonymous with anovulatory.

Anovular menstruation
Menstruation without ovulation. The egg stays within the ovary and usually disintegrates but sometimes it is fertilized, resulting in a life-threatening pregnancy within the ovary.

Anoxia
1. Strictly speaking, the absence of oxygen. 2. The near absence of oxygen. 3. Sometimes used loosely as a synonym for hypoxia.

Anoxic
Pertaining to anoxia, an absence or near absence of oxygen.

Ant, fire
Also called thief ants, a scourge, these red or yellow ants of small-to-medium size, originally from South America, have a severe sting that burns like fire and can trigger an allergic reaction. Avoidance and prompt treatment are essential.

Antagonist

Antean
Exceptionally strong or large. A multi-vitamin pill may, for example, be of Antean proportions.

Antegrade
Forward-moving. As in blood flow. Sometimes synonymous with anterograde.

Antegrade amnesia
Amnesia in which the loss of memory relates to events that occur after a traumatic event. There is inability to recall new information. Old information can be recalled. Antegrade amnesia may follow brain trauma. Also called anterograde amnesia. This type of amnesia is in contrast to retrograde amnesia in which the lack of memory relates to events that occurred before a traumatic event.

Antenatal surgery
The surgical treatment of the fetus before birth. Also called prenatal surgery or, most often, fetal surgery.

Anterior
The front, as opposed to the posterior. The anterior surface of the heart is toward the breast bone (the sternum).

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