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| This glossary contains: 19186 medical terms |
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Chorionic gonadotropin
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Chorionic gonadotropin Human chorionic gonadotropin (hCG) is a peptide hormone produced in pregnancy, that is made by the embryo soon after conception and later by the trophoblast (part of the placenta). Its role is to prevent the demise of the corpus luteum of the ovary and thereby maintain progesterone production that is critical for a pregnancy in humans. hCG may have additional functions, for instance it is thought that it affects the immune tolerance of the pregnancy.
RELATED TERMS--------------------------------------
Gonadotropin
A hormone that stimulates the gonads (ovaries or testicles) to secrete their own hormones, namely, progesterone, testosterone, and estrogen. Synonym gonadotrophin. one of the hormones released by the anterior lobe of the pituitary gland, which programs the activity of the ovary in the female and the testis in the male.
Peptide
Two or more amino acids linked together.
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.
Embryo
The early stages of development before an organism becomes self supporting.
Conception
When a sperm and egg join to form a single cell, usually in the Fallopiantubes. After joining, the fertilized egg travels into the uterus, where itimplants in the lining on its way to growing into an embryo and then a fetus.
Trophoblast
A granular protoplasmic body; a plastid, formed from , eventually surrounds the entire embryo; insert themselves between uterine epithelial cells, then spread along the epithelial surface of the basal lamina that underlies the endometrial epithelium to form a trophoplate.
Corpus
The body of the uterus (womb).
Ovary
The female sex gland that contains ova, or eggs.
Progesterone
A hormone produced in response to luteinizing hormone (LH) released from the pituitary gland. It is required to flush out the uterus if an egg is not fertilized. It is also useful for stimulating the growth of new bone mass.
Immune
Resistant to a particular disease.
Tolerance
Diminished or absent capacity to make a specific response to an antigen, usually produced as a result of contact with that antigen under nonimmunizing conditions.
SIMILAR TERMS--------------------------------------
Chorda tympani
A branch of the facial nerve (the seventh cranial nerve) that serves the taste buds in the front of the tongue, runs through the middle ear, and carries taste messages to the brain.
Chordae Tendinae
The thin, fibrous chords that lead from the valve leaflets to the small papillary muscles within the heart muscle wall, contributes to the support of the tricuspid and mitral valves.
Chordae tendineae
Thread-like bands of fibrous tissue which attach on one end to the edges of the tricuspid and mitral valves of the heart and on the other end to the papillary muscles, small muscles within the heart that serve to anchor the valves.
Chordee
Fixed curvature or tying down of the penis or hypertrophied clitoris as in the hypospadiac birth defect characteristic of various types of hermaphroditism.
Chordoma
A form of bone cancer that usually starts in the lower spinal column.
Chorea
Rapid, jerky, dance-like movement of the body.
Chorioangioma, placental
A benign vascular (blood vessel) tumor of the placenta (afterbirth). Large chorioangiomas cause complications including polyhydramnios (excess amniotic fluid), maternal and fetal clotting problems (coagulopathies), premature delivery, toxemia, fetal heart failure, and hydrops (excess fluid) affecting the fetus.
Choriocarcinoma
A highly malignant tumor that arises from trophoblastic cells within the uterus. Choriocarcinoma tends to be invasive and to metastasize early and widely through both the venous and lymphatic systems. Choriocarcinoma is one of the two types of gestational trophoblastic tumor, the other being hydatidiform mole.
Chorion
The outermost of the two membranes surrounding the embryo/fetus, part of which forms the fetal portion of the placenta.
Chorionic villus sampling
A procedure for first-trimester prenatal diagnosis. Chorionic villus sampling may be done between the eighth and tenth weeks of pregnancy. The aim is to diagnose severe abnormalities afflicting the fetus. In the procedure, tissue is withdrawn from the villi (vascular fingers) of the chorion, a part of the placenta, and examined. Chorionic villus sampling is referred to commonly as CVS.
Chorionic Villus Sampling (CVS)
A procedure in which a small sample of cells are taken from the placenta through a small catheter placed up through the vagina and the cervix. This is done earlier in pregnancy than amniocentesis and is used to test for chromosomal and other biochemical abnormalities that may affect the health and well being of the baby.
Chorioretinitis
An inflammation of the back of the eye involving the choroid and retina. It may be due to a number of different diseases, which affect the body such as toxoplasmosis, histoplasmosis, sarcoidosis, tuberculosis and syphilis.
Choroid
This is the vascular coat between the sclera and the retina, which furnishes blood and nutrition to the outer layer of the retina.
Choroideremia
Atrophy or decay of the choroid, choriocapillaris and Bruch’s membrane of the eye, leading to a severe loss of vision. Usually progresses to light perception by 50 years of age. Leads to night blindness tunnel vision and reduced visual acuity. No treatment available.
Choroiditis
An inflammation of the back of the eye involving the choroid and retina. It may be due to a number of different diseases, which affect the body such as toxoplasmosis, histoplasmosis, sarcoidosis, tuberculosis and syphilis.
PREVIOUS AND NEXT TERMS--------------------------------------
Colitis
Inflammation of the large intestine (colon), especially of its mucous membranes. Spastic colitis is commonly "nervous," or psychosomatic, in origin and is usually a temporary upset rather than a chronic inflammation; this disorder may account for 50 percent of all digestive-tract illnesses. Its symptoms are abdominal pain, diarrhea (sometimes alternating with constipation), and erratic frequency of bowel movements. Treatment of this disorder is basically supportive and psychological in approach.
Corticosteroid
Hormones produced by the adrenal gland which are important to almost every function of cells and organs. They are divided into two groups: glucocorticoids and mineralocorticoids. Glucocorticoids regulate protein, carbohydrate, and fat metabolism. Mineralocorticoids regulate electrolyte balances.
Cardiolipin
One of the components of a cell membrane.
Cirrhosis
A disease involving the destruction of liver cells and diminished liver function. Cirrhosis can block blood flow to the liver causing high blood pressure and/or jaundice.
Chiropractic medicine
Chiropractic medicine is a form of treatment that uses manipulative therapy to correct subluxation, which many chiropracters hold are the cause of most disease. Although manipulative therapy has been shown to have some efficacy in treating back pain, headache, and other symptoms of spinal-related conditions, the application of chiropractic medicine as a cure or outside of this specific area is controversial and generally rejected by medical doctors in most countries. Practictioners of chiropractic medicine generally hold themselves out as doctors of chiropratic (D.C.). The use of manipulative therapy by D.C.'s to treat back pain, headache, and other spinal and musculo-skeletal symptoms enjoys wide acceptance by government medical authorities in many nations, where it is covered by many health plans such as Medicare in the United States. Although some medical doctors (M.D.'s) and many doctors of osteopathy (D.O.'s) do perform manipulative therapy, more than 90% of the treatment of back pain by manipulative therapy is performed by D.C.'s. The studies have shown a high level of patient satisfaction with manipulative therapy by persons with back problems.
Chorionic gonadotropin
Cytoskeleton
System of protein filaments in the cytoplasm of a eukaryotic cell that gives the cell a polarized shape and the capacity for directed movement. Its most abundant components are actin filaments, microtubules, and intermediate filaments.
Cell nucleus
An organelle, found in most eukaryotic cells, which contains most of the cell's genetic material. Nuclei have two primary functions: to control chemical reactions within the cytoplasm and to store information needed for cellular division. Plural: nuclei.
Calcitonin
A hormone secreted by the thyroid gland which controls the levels of calcium and phosphorous in the blood.
Carbohydrates
A type of food, usually derived from plants; one of three nutrients that supply calories to the body; includes simple carbohydrates (sugar, fruit) and complex carbohydrates (vegetables, starches).
Cholesterol
A substance similar to fat that is found in the blood, muscles, liver, brain, and other body tissues.
RELATED TERMS--------------------------------------
Gonadotropin
A hormone that stimulates the gonads (ovaries or testicles) to secrete their own hormones, namely, progesterone, testosterone, and estrogen. Synonym gonadotrophin. one of the hormones released by the anterior lobe of the pituitary gland, which programs the activity of the ovary in the female and the testis in the male.
Peptide
Two or more amino acids linked together.
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.
Embryo
The early stages of development before an organism becomes self supporting.
Conception
When a sperm and egg join to form a single cell, usually in the Fallopiantubes. After joining, the fertilized egg travels into the uterus, where itimplants in the lining on its way to growing into an embryo and then a fetus.
Trophoblast
A granular protoplasmic body; a plastid, formed from , eventually surrounds the entire embryo; insert themselves between uterine epithelial cells, then spread along the epithelial surface of the basal lamina that underlies the endometrial epithelium to form a trophoplate.
Corpus
The body of the uterus (womb).
Ovary
The female sex gland that contains ova, or eggs.
Progesterone
A hormone produced in response to luteinizing hormone (LH) released from the pituitary gland. It is required to flush out the uterus if an egg is not fertilized. It is also useful for stimulating the growth of new bone mass.
Immune
Resistant to a particular disease.
Tolerance
Diminished or absent capacity to make a specific response to an antigen, usually produced as a result of contact with that antigen under nonimmunizing conditions.
SIMILAR TERMS--------------------------------------
Chorda tympani
A branch of the facial nerve (the seventh cranial nerve) that serves the taste buds in the front of the tongue, runs through the middle ear, and carries taste messages to the brain.
Chordae Tendinae
The thin, fibrous chords that lead from the valve leaflets to the small papillary muscles within the heart muscle wall, contributes to the support of the tricuspid and mitral valves.
Chordae tendineae
Thread-like bands of fibrous tissue which attach on one end to the edges of the tricuspid and mitral valves of the heart and on the other end to the papillary muscles, small muscles within the heart that serve to anchor the valves.
Chordee
Fixed curvature or tying down of the penis or hypertrophied clitoris as in the hypospadiac birth defect characteristic of various types of hermaphroditism.
Chordoma
A form of bone cancer that usually starts in the lower spinal column.
Chorea
Rapid, jerky, dance-like movement of the body.
Chorioangioma, placental
A benign vascular (blood vessel) tumor of the placenta (afterbirth). Large chorioangiomas cause complications including polyhydramnios (excess amniotic fluid), maternal and fetal clotting problems (coagulopathies), premature delivery, toxemia, fetal heart failure, and hydrops (excess fluid) affecting the fetus.
Choriocarcinoma
A highly malignant tumor that arises from trophoblastic cells within the uterus. Choriocarcinoma tends to be invasive and to metastasize early and widely through both the venous and lymphatic systems. Choriocarcinoma is one of the two types of gestational trophoblastic tumor, the other being hydatidiform mole.
Chorion
The outermost of the two membranes surrounding the embryo/fetus, part of which forms the fetal portion of the placenta.
Chorionic villus sampling
A procedure for first-trimester prenatal diagnosis. Chorionic villus sampling may be done between the eighth and tenth weeks of pregnancy. The aim is to diagnose severe abnormalities afflicting the fetus. In the procedure, tissue is withdrawn from the villi (vascular fingers) of the chorion, a part of the placenta, and examined. Chorionic villus sampling is referred to commonly as CVS.
Chorionic Villus Sampling (CVS)
A procedure in which a small sample of cells are taken from the placenta through a small catheter placed up through the vagina and the cervix. This is done earlier in pregnancy than amniocentesis and is used to test for chromosomal and other biochemical abnormalities that may affect the health and well being of the baby.
Chorioretinitis
An inflammation of the back of the eye involving the choroid and retina. It may be due to a number of different diseases, which affect the body such as toxoplasmosis, histoplasmosis, sarcoidosis, tuberculosis and syphilis.
Choroid
This is the vascular coat between the sclera and the retina, which furnishes blood and nutrition to the outer layer of the retina.
Choroideremia
Atrophy or decay of the choroid, choriocapillaris and Bruch’s membrane of the eye, leading to a severe loss of vision. Usually progresses to light perception by 50 years of age. Leads to night blindness tunnel vision and reduced visual acuity. No treatment available.
Choroiditis
An inflammation of the back of the eye involving the choroid and retina. It may be due to a number of different diseases, which affect the body such as toxoplasmosis, histoplasmosis, sarcoidosis, tuberculosis and syphilis.
PREVIOUS AND NEXT TERMS--------------------------------------
Colitis
Inflammation of the large intestine (colon), especially of its mucous membranes. Spastic colitis is commonly "nervous," or psychosomatic, in origin and is usually a temporary upset rather than a chronic inflammation; this disorder may account for 50 percent of all digestive-tract illnesses. Its symptoms are abdominal pain, diarrhea (sometimes alternating with constipation), and erratic frequency of bowel movements. Treatment of this disorder is basically supportive and psychological in approach.
Corticosteroid
Hormones produced by the adrenal gland which are important to almost every function of cells and organs. They are divided into two groups: glucocorticoids and mineralocorticoids. Glucocorticoids regulate protein, carbohydrate, and fat metabolism. Mineralocorticoids regulate electrolyte balances.
Cardiolipin
One of the components of a cell membrane.
Cirrhosis
A disease involving the destruction of liver cells and diminished liver function. Cirrhosis can block blood flow to the liver causing high blood pressure and/or jaundice.
Chiropractic medicine
Chiropractic medicine is a form of treatment that uses manipulative therapy to correct subluxation, which many chiropracters hold are the cause of most disease. Although manipulative therapy has been shown to have some efficacy in treating back pain, headache, and other symptoms of spinal-related conditions, the application of chiropractic medicine as a cure or outside of this specific area is controversial and generally rejected by medical doctors in most countries. Practictioners of chiropractic medicine generally hold themselves out as doctors of chiropratic (D.C.). The use of manipulative therapy by D.C.'s to treat back pain, headache, and other spinal and musculo-skeletal symptoms enjoys wide acceptance by government medical authorities in many nations, where it is covered by many health plans such as Medicare in the United States. Although some medical doctors (M.D.'s) and many doctors of osteopathy (D.O.'s) do perform manipulative therapy, more than 90% of the treatment of back pain by manipulative therapy is performed by D.C.'s. The studies have shown a high level of patient satisfaction with manipulative therapy by persons with back problems.
Chorionic gonadotropin
Cytoskeleton
System of protein filaments in the cytoplasm of a eukaryotic cell that gives the cell a polarized shape and the capacity for directed movement. Its most abundant components are actin filaments, microtubules, and intermediate filaments.
Cell nucleus
An organelle, found in most eukaryotic cells, which contains most of the cell's genetic material. Nuclei have two primary functions: to control chemical reactions within the cytoplasm and to store information needed for cellular division. Plural: nuclei.
Calcitonin
A hormone secreted by the thyroid gland which controls the levels of calcium and phosphorous in the blood.
Carbohydrates
A type of food, usually derived from plants; one of three nutrients that supply calories to the body; includes simple carbohydrates (sugar, fruit) and complex carbohydrates (vegetables, starches).
Cholesterol
A substance similar to fat that is found in the blood, muscles, liver, brain, and other body tissues.
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This dictionary contains 19186 terms.
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