MEDizzy
MEDizzy
Zunaira saleh
Zunaira salehabout 21 hours ago
Feedback controls in endocrine system

Feedback controls in endocrine system

Endocrine organs and the presence of feedback controls. Both positive and negative feedback controls exist for each endocrine gland having a regulating (R) and stimulating (S) hormone. Those acting through hypothalamic-pituitary axis include: thyroid hormones on TRHTSH axis, cortisol on CRH-ACTH axis, gonadal steroids on GnRH-LH/FSH axis and insulin-like GH on GHRH-GH axis. Those independent of pituitary control (shown by interrupted arrows) have also feedback controls by calcium on PTH, and hypoglycaemia on insulin release by pancreatic islets.

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