Category: P
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Prekallikreins
Precursor of the kallikreins that are a group of serine proteases. These act on plasma a2-globulins to release kinins such as bradykinin, a potent vasodilator.
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Pregnenolone
A steroid produced from cholesterol that is a precursor to cortisol and progesterone. A steroid synthesized in the adrenal glands, ovaries, and testes. Pregnenolone is an important intermediate product in steroid hormone synthesis and can, depending on the pathways followed, be converted to corticosteroids (glucocorticoids or mineralocorticoids), androgens, or estrogens.
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Pregnancy-induced hypertension
An increase in blood pressure due to pregnancy. If markedly elevated, it is a sign of pending toxemia. A complication of pregnancy marked by increasing blood pressure, proteinuria, and edema. Diagnostic criteria include an increase of 30 mm Hg systolic or 15 mm Hg diastolic over the baseline pressure for the individual woman (or readings…
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Pregnancy-induced hyperglycemia
Abnormal glucose tolerance that occurs during gestation (gestational diabetes) but not before or after.
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Pregnancy-induced amemia
Dilution of the red cell number due to the increase in blood volume associated with pregnancy.
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Prealbumin
A blood protein smaller than albumin, which migrates ahead of it when a sample of blood proteins are separated by electrophoresis.
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Prazosin hydrochloride
A drug that is an a-blocker and serves as an antihypertensive drug.
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Pravastatin sodium
A member of the statin family of drugs that act as HMG CoA inhibitors and thus inhibit cholesterol synthesis in the body.
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Pompe’s disease
A rare genetic disease due to a mutation in the gene for the enzyme α-1,- glucosidase; characterized by excess glycogen stores in the muscle. Also called Type II glycogen storage disease. Pompe disease (PD) is a rare, heritable disorder of carbohydrate metabolism. PD is typified by glycogen (a complex carbohydrate polymer) deposition in skeletal and…
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Poisonous plants
Plants that contain toxic materials sufficient to cause serious symptoms. Plants that cause an allergic or direct chemical reaction on the skin. Poison ivy, oak, and sumac are three of the most common causes of allergic reactions from plants. Most people develop an allergic reaction or allergic contact dermatitis when they are exposed to these…