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Dehydroepiandrosterone
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DehydroepiandrosteroneDHEA. A steroid hormone made by the adrenal glands that acts on the body much like testosterone and is converted into testosterone and estrogen. DHEA and its sulfate (DHEAS) are abundant in the body, but their normal roles are not fully understood. The blood levels of DHEA and DHEAS decline with age.
RELATED TERMS--------------------------------------
DHEA
Dehydroepiandrosterone.
Steroid
One of a group of naturally occurring or synthetic hormones which are complex lipids based on the cholesterol molecule, and which affect chemical processes in the body, growth, and sexual and other physiological functions. They include adrenal cortical, testicular, and ovarian hormones and their derivatives.
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.
Testosterone
The hormone that promotes the building of muscle mass in males and libido in both sexes.
Estrogen
A hormone produced in the ovaries that works with progesterone to, among other things, regulate the reproductive cycle.
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.
SIMILAR TERMS--------------------------------------
Dehydration
Loss of fluids from the body, often caused by diarrhea. May result in loss of important salts and minerals.
PREVIOUS AND NEXT TERMS--------------------------------------
Degeneration, macular
A disease that progressively destroys the macula, the central portion of the retina, impairing central vision. Macular degeneration rarely causes blindness because only the center of vision is affected. However, injury to the macula in the center of the retina can impair the ability to see straight ahead clearly and sometimes make it difficult to read, drive, or perform other daily activities that require fine central vision.
Degenerative arthritis
Also known as osteoarthritis, this type of arthritis is caused by inflammation, breakdown and eventual loss of the cartilage of the joints. Among the over 100 different types of arthritis conditions, osteoarthritis is the most common, affecting usually the hands, feet, spine, and large weight-bearing joints, such as the hips and knees. Also called degenerative joint disease.
Deglutition
The act of swallowing, particularly the swallowing of food. The muscles of deglutition are the muscles employed in the act of swallowing.
Dehisce
To burst open or gape. A surgical wound may partially or completely dehisce after surgery, depending upon whether some or all of the layers of tissue come open.
DEHP
A softener for polyvinyl chloride (PVC), a plastic polymer used in a wide array of products. Unplasticized PVC is hard and brittle at room temperature. A plasticizer (softener) is typically added to increase the flexibility of the polymer. DEHP is the plasticizer for most PVC medical devices. Devices that may contain DEHP-plasticized PVC include: intravenous (IV) bags and tubing, umbilical artery catheters, blood bags and infusion tubing, enteral nutrition feeding bags, nasogastric tubes, peritoneal dialysis bags and tubing, tubing used in cardiopulmonary bypass (CPB) procedures, tubing used in extracorporeal membrane oxygenation (ECMO), and tubing used during hemodialysis.
Dehydroepiandrosterone
Deinococcus radiodurans
A bacterium that can survives extremely high levels of radiation and therefore has high potential for radioactive waste cleanup. The genome of Deinococcus radiodurans has been sequenced. It is composed of two chromosomes, a megaplasmid, and a small plasmid. The total genome contains 3,284, 156 base pairs. Deinococcus radiodurans is an organism in which all systems for DNA repair, DNA damage export, desiccation and starvation recovery, and genetic redundancy are all present in one cell.
Delay, developmental
Behind schedule in reaching milestones of early childhood development.
Deletion
Loss of a segment of DNA from a chromosome (and hence from the genome).
Delirium tremens
A neurological symptom of alcohol withdrawal seen in chronic alcoholism, with includes symptoms of psychosis. These may include uncontrollable trembling, hallucinations, severe anxiety, sweating, and sudden feelings of terror. Delirium tremens can be both frightening and, in severe cases, deadly. Treatment includes observation, comfort care, and in some cases medication.
Delivery, breech
Delivery in which the buttocks present before the head.
RELATED TERMS--------------------------------------
DHEA
Dehydroepiandrosterone.
Steroid
One of a group of naturally occurring or synthetic hormones which are complex lipids based on the cholesterol molecule, and which affect chemical processes in the body, growth, and sexual and other physiological functions. They include adrenal cortical, testicular, and ovarian hormones and their derivatives.
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.
Testosterone
The hormone that promotes the building of muscle mass in males and libido in both sexes.
Estrogen
A hormone produced in the ovaries that works with progesterone to, among other things, regulate the reproductive cycle.
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.
SIMILAR TERMS--------------------------------------
Dehydration
Loss of fluids from the body, often caused by diarrhea. May result in loss of important salts and minerals.
PREVIOUS AND NEXT TERMS--------------------------------------
Degeneration, macular
A disease that progressively destroys the macula, the central portion of the retina, impairing central vision. Macular degeneration rarely causes blindness because only the center of vision is affected. However, injury to the macula in the center of the retina can impair the ability to see straight ahead clearly and sometimes make it difficult to read, drive, or perform other daily activities that require fine central vision.
Degenerative arthritis
Also known as osteoarthritis, this type of arthritis is caused by inflammation, breakdown and eventual loss of the cartilage of the joints. Among the over 100 different types of arthritis conditions, osteoarthritis is the most common, affecting usually the hands, feet, spine, and large weight-bearing joints, such as the hips and knees. Also called degenerative joint disease.
Deglutition
The act of swallowing, particularly the swallowing of food. The muscles of deglutition are the muscles employed in the act of swallowing.
Dehisce
To burst open or gape. A surgical wound may partially or completely dehisce after surgery, depending upon whether some or all of the layers of tissue come open.
DEHP
A softener for polyvinyl chloride (PVC), a plastic polymer used in a wide array of products. Unplasticized PVC is hard and brittle at room temperature. A plasticizer (softener) is typically added to increase the flexibility of the polymer. DEHP is the plasticizer for most PVC medical devices. Devices that may contain DEHP-plasticized PVC include: intravenous (IV) bags and tubing, umbilical artery catheters, blood bags and infusion tubing, enteral nutrition feeding bags, nasogastric tubes, peritoneal dialysis bags and tubing, tubing used in cardiopulmonary bypass (CPB) procedures, tubing used in extracorporeal membrane oxygenation (ECMO), and tubing used during hemodialysis.
Dehydroepiandrosterone
Deinococcus radiodurans
A bacterium that can survives extremely high levels of radiation and therefore has high potential for radioactive waste cleanup. The genome of Deinococcus radiodurans has been sequenced. It is composed of two chromosomes, a megaplasmid, and a small plasmid. The total genome contains 3,284, 156 base pairs. Deinococcus radiodurans is an organism in which all systems for DNA repair, DNA damage export, desiccation and starvation recovery, and genetic redundancy are all present in one cell.
Delay, developmental
Behind schedule in reaching milestones of early childhood development.
Deletion
Loss of a segment of DNA from a chromosome (and hence from the genome).
Delirium tremens
A neurological symptom of alcohol withdrawal seen in chronic alcoholism, with includes symptoms of psychosis. These may include uncontrollable trembling, hallucinations, severe anxiety, sweating, and sudden feelings of terror. Delirium tremens can be both frightening and, in severe cases, deadly. Treatment includes observation, comfort care, and in some cases medication.
Delivery, breech
Delivery in which the buttocks present before the head.
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This dictionary contains 19186 terms.
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