Ammonia in the body is derived primarily from the metabolic degradation of which substrate?

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Multiple Choice

Ammonia in the body is derived primarily from the metabolic degradation of which substrate?

Explanation:
Ammonia in the body mainly comes from removing amino groups during the breakdown of proteins. When proteins are degraded, amino acids undergo deamination, releasing ammonia (NH3). This ammonia is then transported to the liver, where it’s converted to urea via the urea cycle for excretion. Lipids and carbohydrates don’t contribute ammonia in significant amounts because they don’t contain amino groups to be released, and alcohol metabolism mainly yields acetaldehyde and acetate with little direct ammonia production. So the primary source of body ammonia is the metabolic degradation of proteins.

Ammonia in the body mainly comes from removing amino groups during the breakdown of proteins. When proteins are degraded, amino acids undergo deamination, releasing ammonia (NH3). This ammonia is then transported to the liver, where it’s converted to urea via the urea cycle for excretion. Lipids and carbohydrates don’t contribute ammonia in significant amounts because they don’t contain amino groups to be released, and alcohol metabolism mainly yields acetaldehyde and acetate with little direct ammonia production. So the primary source of body ammonia is the metabolic degradation of proteins.

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