<prompt> GH secetion is inhibited by: March 2005BromocriptineHyperglycemiaVigorous exerciseDeep sleep  <response>: Ans. B: Hyperglycemia Inhibitors of GH secretion include Somatostatin from the periventricular nucleus Circulating concentrations of GH and IGF-1 negative feedback on the pituitary and hypothalamus Hyperglycemia Glucocoicoids Dihydrotestosterone Stimulators of GH secretion include Peptide hormones - Growth hormone releasing hormone GHRH through binding to the growth hormone releasing hormone receptor GHRHR - GF.relin through binding to growth hormone secretagogue receptors GHSR Sex horn:cnes - Inc-teased androgen secretion during pubey in males from testis and in females from adrenal coex - Estrogen - Clonidine and L-DOPA by stimulating GHRH release Hypoglycaemia, arginine and propranolol by inhibiting somatostatin release Deep sleep Fasting Vigorous exercise Bromocriptine increase GH release in normal individuals, but decreases the same from pituitary tumours that cause acromegaly. 