KINESIOL 1YY3 Lecture Notes - Lecture 27: Negative Feedback, Thyrotropin-Releasing Hormone, Anterior Pituitary
Known as the master endocrine glands - the hormone released/inhibited from the hypothalamus act on the pituitary glands - pituitary gland which then releases its hormones - which go further on the cause more hormone release. Posterior - neurohypophysis - it originates in neural tissue - secretes 2 hormones (neurohormones / neuropeptides) Anterior - adenohypophysis - develops from the embryonic oral cavity - secretes o. Hypothalamus release/ inhibition of hormones is based on feedback from other hormones, sensory information etc. 1 cm in diameter: controls the whole body - pretty cool! Anterior bigger than posterior of pituitary gland. Stimuli that comes from the ns - causes the hypothalamic neuron to stimulate the release/ inhibited the hormone. These hormones enter the circulation and pass directly the pituitary through the hypothalamalohypophysial portal system (two capillary beds connected directly) Leave the capillaries and bind to their target cells - which then release their own hormones.