PHYSL210B Lecture Notes - Lecture 13: Nocturnal Enuresis, Posterior Pituitary, Anterior Pituitary
28 Mar 2019
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Document Summary
A region of the brain known as hypothalamus is found in the forebrain. Pituitary gland is situated at the base of the brain (close to brain stem) and is not part of the brain. Hypothalamus and pituitary are connected by a tissue bridge called infundibulum. The pituitary has an anterior and a posterior side. Axon from hypothalamus can release nts/hormones in the blood that can positively or negatively regulate the anterior pituitary. Innervation of posterior pituitary hormones synthesised in the hypothalamus travel through axon and innervate the pituitary gland. Hypothalamus has two types of specialised cells paraventricular nuclei and supraoptic nuclei. Hypothalamo- hypophyseal portal vessels blood coming from capillary bed from a vein and then it enters another vein and then another capillary bed. Adh helps to conserve blood volume and water content by stimulating the kidneys to retain and reabsorb water. Adh increases blood pressure by constricting arteries and arterioles (vasoconstriction)
