Which of the following is an effect of testosterone?

A. Promotes RBC production

B. Promotes anabolism of proteins

C. Promotes growth of skeletal muscles

D. All of above

Answer: D - All of the above.

A. Testosterone in RBC production

Amongst many functions testosterone also promote production of red blood cells. Testosterone in general increases sex drive (libido) in man. Red blood cells are responsible for supplying oxygen that is needed during muscle functions and sexual act or arousal. Therefore high libido requires adequate supply of oxygen thus the promotes red blood cells production.

B. Testosterone in protein anabolism.

Testosterone promotes the production of sperm in testes which is more of a protein by nature, thus the constant anabolism of proteins.

C. Promotes growth of skeletal muscles.

Abundant secretion of testosterone hormone gives man their masculanity and high muscle mass. Puberty stage symptoms in man is their skeletal muscle growth which is because of increased testosterone level.

Therefore the answer is D.