Category: A
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Ad libitum
A Latin term meaning to eat freely or to have unrestricted access to food.
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Acylcarnitine transport system
Essential for the oxidation of fatty acids in the mitochondria. The fatty acids are activated by conversion to their CoA thioesters. This activation requires ATP and the enzyme, acyl CoA synthase or thiokinase. There are several thiokinases, which differ with respect to their specificity for the different fatty acids. The activation step is dependent on…
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Acylation
The addition of an acyl group (carbon chain) to a substrate. Incorporation of an acyl (alkanoyl) group into a chemical compound.
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Acute tubular necrosis
Most common form of acute renal failure that results when an ischemic event or a nephrotoxin damages the renal tubules. Acute damage to the renal tubules; usually due to ischemia associated with shock.
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Acute renal failure
Cessation of renal (kidney) function. A condition in which the kidneys suddenly cease to produce urine and to filter waste products from the blood. Cessation may be partial or total. A sudden and significant decrease in the kidneys’ filtration capabilities and, within hours or days, an increase in the levels of creatinine and other waste…
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Actuarial data
Information used to create mortality tables and life expectancy numbers.
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Activity increment
The energy needed to sustain body activities. The typical energy costs of a variety of activities are shown in Table 2.
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Actinomycin D
An antibiotic containing D-amino acids.
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Acroderma enteropatica
A rare genetic disease characterized by an inability to absorb zinc.
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Acidic amino acids
Amino acids having two carboxyl groups in their structures. These amino acids are aspartic and glutamic acids.