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A by-product of protein catabolism is called__________.

A.

azotemia

B.

creatinine

C.

uric acid

D.

urea

Answer and Explanation

The Correct Answer is D

A. Azotemia is a condition characterized by elevated levels of nitrogenous waste products in the blood, not a direct by-product of protein catabolism.

 

B. Creatinine is a by-product of muscle metabolism, not directly from protein catabolism. 

 

C. Uric acid is a by-product of nucleic acid metabolism, not protein catabolism. 

 

D. Urea is a primary by-product of protein catabolism, formed in the liver and excreted by the kidneys. This is the correct answer.


View Related questions

Correct Answer is A

Explanation

A. Uterine tube: Fertilization typically occurs in the uterine tube (also known as the fallopian tube). The sperm travels from the cervix through the uterus and into the uterine tube, where it meets and fertilizes the egg.

B. Uterus: The uterus is where the fertilized egg implants and develops into a fetus, but it is not where fertilization occurs.

C. Ovary: The ovary is where eggs are produced and released during ovulation, but fertilization does not occur here.

D. Urinary bladder: The urinary bladder is part of the urinary system, not the reproductive system, and has no role in fertilization.

Correct Answer is B

Explanation

A. 20,000 to 30,000: This number is too high for the typical number of sperm that reach the vicinity of the egg.

B. 20 to 200: This number is within the range of the actual number of sperm that typically reach the vicinity of the egg.

C. Half: This is an exaggerated number, as far fewer than half of the ejaculated sperm reach the vicinity of the egg.

D. 2000 to 3000: This number is too high for the typical number of sperm that reach the vicinity of the egg.