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| This glossary contains: 19186 medical terms |
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Acentric chromosome
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Acentric chromosome"A fragment of a chromosome (one of the microscopically visible carriers of the genetic material DNA) that is lacking a centromere (the ""waist"" of the chromosome essential for the division and the retention of the chromosome in the cell) and so is lost when the cell divides."
RELATED TERMS--------------------------------------
Chromosome
A structural unit within a eukaryotic nucleus that carries genes. A chromosome consists of a long, continuous strand of DNA and associated proteins.
Genetic
Hereditary. Having to do with the genes.
Centromere
The cinched "waist" of the chromosome essential for the division and the retention of the chromosome in the cell. The centromere is a uniquely specialized region of the chromosome to which spindle fibers attach during cell division.
Essential
1. Something that cannot be done without. 2. Required in the diet, because the body cannot make it. As in an essential amino acid or an essential fatty acid. 3. Idiopathic. As in essential hypertension.
Cell
Fundamental structural unit of all life. The cell consists primarily of an outer plasma membrane, which separates it from the environment; the genetic material (DNA), which encodes heritable information for the maintainance of life; and the cytoplasm, a heterogeneous assemblage of ions, molecules, and fluid.
SIMILAR TERMS--------------------------------------
PREVIOUS AND NEXT TERMS--------------------------------------
ACE inhibitor
A drug that inhibits ACE (angiotensin converting enzyme) which is important to the formation of angiotensin II. Angiotensin II causes arteries in the body to constrict and thereby raises the blood pressure. ACE inhibitors lower the blood pressure by inhibiting the formation of angiotensin II. This relaxes the arteries. Relaxing the arteries not only lowers blood pressure, but also improves the pumping efficiency of a failing heart and improves cardiac output in patients with heart failure. ACE inhibitors are therefore used for blood pressure control and congestive heart failure.
ACE2 (angiotensin converting enzyme 2)
An essential regulator of heart function. Also may be involved in the embryonic development of the heart. The ACE2 gene has been mapped to the X chromosome (band Xp22).
ACEI
ACE inhibitor.
Acellular
Not made up of cells or divided into cells. Or lacking intact cells as, for example, an acellular vaccine which may contain cellular material but not complete cells.
Acellular vaccine
A vaccine that may contain cellular material but does not contain complete cells.
Acentric chromosome
Aceruloplasminemia
A genetic disorder in which there is absence of the protein ceruloplasmin from blood and accumulation of iron in the pancreas, liver and brain, causing diabetes and progressive neurodegeneration with the tremors and gait abnormalities characteristic of Parkinson disease.
Acetabular
"Pertaining to the acetabulum, the cup-shaped socket of the hip joint which is a key feature of the pelvis. The head (upper end) of the femur (the thighbone) fits into the acetabulum and articulates with it, forming a ball-and-socket joint. The acetabulum is not just cup-shaped. The word ""acetabulum"" in Latin means cup, a vinegar cup."
Acetabular labrum
"A ring of fibrocartilage (fibrous cartilage) that runs around the acetabulum (cup) of the hip joint and increases its depth. The head of the femur (the bone in the thigh) fits in the acetabulum. The labrum deepens this cavity and effectively increases the surface (and strength) of the hip joint. Injuries to the acetabular labrum can occur from chronic trauma due to repetitive hip motion or from acute trauma as, for example, from a direct blow to the hip or a violent motion of the hip. Signs and symptoms of a acetabular labrum injury include pain accompanying hip motion, occasional pain in the hip at night or during daily activities, decreased range of motion and loss of strength in the hip. Treatment may include anti-inflammatory medication and rest. Exercises to strengthen the hip muscles may then be recommended. If these measures are not effective, arthroscopic surgery may be done. In medicine, a labrum is a ring of fibrocartilage around the edge of the articular (joint) surface of a bone. The Latin ""labrum"" means ""lip."" The term is used generally to designate a lip, edge, or brim. Plural, labra."
Acetabulum
"The cup-shaped socket of the hip joint. In fact, in Latin an ""acetabulum"" is cup, a vinegar cup. The acetabulum is a feature of the pelvis. The head (upper end) of the femur (the thighbone) fits into the acetabulum and articulates with it, forming a ball-and-socket joint."
Acetate
A molecular ion derived from acetic acid. The formula of acetate is CH3COO-.
RELATED TERMS--------------------------------------
Chromosome
A structural unit within a eukaryotic nucleus that carries genes. A chromosome consists of a long, continuous strand of DNA and associated proteins.
Genetic
Hereditary. Having to do with the genes.
Centromere
The cinched "waist" of the chromosome essential for the division and the retention of the chromosome in the cell. The centromere is a uniquely specialized region of the chromosome to which spindle fibers attach during cell division.
Essential
1. Something that cannot be done without. 2. Required in the diet, because the body cannot make it. As in an essential amino acid or an essential fatty acid. 3. Idiopathic. As in essential hypertension.
Cell
Fundamental structural unit of all life. The cell consists primarily of an outer plasma membrane, which separates it from the environment; the genetic material (DNA), which encodes heritable information for the maintainance of life; and the cytoplasm, a heterogeneous assemblage of ions, molecules, and fluid.
SIMILAR TERMS--------------------------------------
PREVIOUS AND NEXT TERMS--------------------------------------
ACE inhibitor
A drug that inhibits ACE (angiotensin converting enzyme) which is important to the formation of angiotensin II. Angiotensin II causes arteries in the body to constrict and thereby raises the blood pressure. ACE inhibitors lower the blood pressure by inhibiting the formation of angiotensin II. This relaxes the arteries. Relaxing the arteries not only lowers blood pressure, but also improves the pumping efficiency of a failing heart and improves cardiac output in patients with heart failure. ACE inhibitors are therefore used for blood pressure control and congestive heart failure.
ACE2 (angiotensin converting enzyme 2)
An essential regulator of heart function. Also may be involved in the embryonic development of the heart. The ACE2 gene has been mapped to the X chromosome (band Xp22).
ACEI
ACE inhibitor.
Acellular
Not made up of cells or divided into cells. Or lacking intact cells as, for example, an acellular vaccine which may contain cellular material but not complete cells.
Acellular vaccine
A vaccine that may contain cellular material but does not contain complete cells.
Acentric chromosome
Aceruloplasminemia
A genetic disorder in which there is absence of the protein ceruloplasmin from blood and accumulation of iron in the pancreas, liver and brain, causing diabetes and progressive neurodegeneration with the tremors and gait abnormalities characteristic of Parkinson disease.
Acetabular
"Pertaining to the acetabulum, the cup-shaped socket of the hip joint which is a key feature of the pelvis. The head (upper end) of the femur (the thighbone) fits into the acetabulum and articulates with it, forming a ball-and-socket joint. The acetabulum is not just cup-shaped. The word ""acetabulum"" in Latin means cup, a vinegar cup."
Acetabular labrum
"A ring of fibrocartilage (fibrous cartilage) that runs around the acetabulum (cup) of the hip joint and increases its depth. The head of the femur (the bone in the thigh) fits in the acetabulum. The labrum deepens this cavity and effectively increases the surface (and strength) of the hip joint. Injuries to the acetabular labrum can occur from chronic trauma due to repetitive hip motion or from acute trauma as, for example, from a direct blow to the hip or a violent motion of the hip. Signs and symptoms of a acetabular labrum injury include pain accompanying hip motion, occasional pain in the hip at night or during daily activities, decreased range of motion and loss of strength in the hip. Treatment may include anti-inflammatory medication and rest. Exercises to strengthen the hip muscles may then be recommended. If these measures are not effective, arthroscopic surgery may be done. In medicine, a labrum is a ring of fibrocartilage around the edge of the articular (joint) surface of a bone. The Latin ""labrum"" means ""lip."" The term is used generally to designate a lip, edge, or brim. Plural, labra."
Acetabulum
"The cup-shaped socket of the hip joint. In fact, in Latin an ""acetabulum"" is cup, a vinegar cup. The acetabulum is a feature of the pelvis. The head (upper end) of the femur (the thighbone) fits into the acetabulum and articulates with it, forming a ball-and-socket joint."
Acetate
A molecular ion derived from acetic acid. The formula of acetate is CH3COO-.
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This dictionary contains 19186 terms.
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