Endocrinology Flashcards
what is endocrine?
released into circulation and finds the cell that is specific to a ligand (target organ)
what are the major endocrine glands?
hypothalamus, pituitary (anterior and posterior), thyroid, parathyroid, pancreas, kidney, adrenal glands, and ovaries/testes
what are the 5 hormones the hypothalamus releases?
TRH (thyrotropin - releasing horomone) GnRH (gonadotropin releasing hormone) GHRH (growth hormone releasing hormone) CRH (corticotropin releasing hormone) Somatostatin
where does TRH target?
anterior lobe of pituitary
what is the action of TRH
stimulates the release of thyroid-stimulating hormone (TSH)
what does GnRH target?
anterior lobe of pituitary
what is the action of GnRH?
stimulates the release of follicle stimulating hormone (FSH) and lutenizing hormone (LH)
what does GHRH target?
anterior lobe of pituitary
what is the action of GHRH?
stimulates the release of growth hormone (GH)
what does CRH target?
anterior lobe of pituitary
what is the action of CRH
stimulates the release of adrenocorticotropic hormone (ACTH)
what does somatostatin target?
anterior lobe of the pituitary
what is the action of somatostatin?
inhibits the release of GH and TSH
where else is somatostatin found and what is the action from that endocrine gland?
found in the pancreas…. regulates insulin and glucagon
the hypothalamus exerts ______________________________ over the anterior pituitary
hormonal control of the anterior pituitary through releasing and inhibiting hormones
what are the 6 hormones released from anterior pituitary?
GH, TSH, ACTH, FSH, LH, and prolactin
what is the target of GH
bones, muscles, and organs
what is the action of GH
stimulate body growth by: increasing protein synthesis and fat mobilization and decreasing carbohydrate utilization
how does GH stimulate and control the rate of skeletal and visceral growth
directly influencing protein, carbs, and lipid metabolism
what is the target for TSH
thyroid
what is the action of TSH
stimultes secretion of thyroid hormones (T3 and T4)
what is the target for ACTH?
adrenal cortex
what is the action of ACTH?
stimulates secretion of adrenal cortex hormones (mineralcorticoid, glucocorticoid, and sex hormones)
what is the target of FSH
ovaries and testes
what is the action of FSH
stimulates follicle to produce estrogen and promotes maturation of sperm
what is the target for LH
testes and ovaries
what is the action of LH
stimulates ovulation, stimulates testes to secrete testosterone