Which one of the following flows directly into the blood from seat of its production to act on an organ away from it
Rennin
Renin
Cholesterol
Cholesterase
A health disorder that results from the deficiency of thyroxine in adults and characterised by $(i)$ a low metabolic rate, $(ii)$ increase in body weight and $(iii)$ tendency to retain water in tissues is
Term 'hormone' was coined by
The source of somatostatin is same as that of
Graafian follicles are formed by the active division of
The process of spermatogenesis and sperm formation is under the regulatory influence of