Midgets are due to the deficiency of

In males, the spermatogenesis is regulated by

Which one of the following flows directly into the blood from seat of its production to act on an organ away from it

Which of the following vitamins has some physiological effects similar to those of parathormone?

....... hormone produce anabolic effect on protein and carbohydrate metabolism

Symptoms like pot-bellied, pigeon like chest, protruding tongue and mental retardation are of