Which of the following combinations is/are required for the secretion of testosterone?
a. GnRH only
b. LH only
c. Sertoli cells only
d. GnRH and LH only
e. GnRH, LH, and Sertoli cells
D
You might also like to view...
Which of the following locations is the main reservoir for nitrogen in the nitrogen cycle?
A) atmosphere B) sedimentary bedrock C) fossilized plant and animal remains (coal, oil, and natural gas) D) plant and animal biomass E) soil
Which antigen, expressed on the surface of all red blood cells, is modified by A- or B-transferases?
What will be an ideal response?
The energy difference between the reactant glucose and oxygen molecules and the product water and carbon dioxide is 686 kilocalories, yet the 36 ATP molecules produced are only storing 263 kilocalories in their outermost phosphate bond. The rest of the energy went
What will be an ideal response?
Select the correct statement.
A) in humans, meiosis of diploid cells in the ovaries produces haploid female gametes, or eggs B) in humans, mitosis of haploid cells in the testes produces haploid gametes, or sperm C) in plants, diploid cells in the anther undergo meiosis to produce eggs D) in plants, diploid cells in the ovule undergo meiosis to produce diploid gametes E) none of the choices is correct