ANAT 261 Lecture Notes - Lecture 7: Vasa Vasorum, Perfusion, Aldosterone
7 Feb 2021
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It has many tight junctions and gap junctions. (cid:120) the endothelial lining plays a metabolic function because it contains proteases. It converts angiotensin i to angiotensin ii. (cid:131) angiotensin causes vasoconstriction to raise the blood pressure, and stimulates the release of aldosterone that promotes sodium retention in the kidneys. It is difficult to see and its fibrocytes usually are not visible: the ielm is wavy and very acidophilic. It is wavy because it retracts during fixation as there is not blood going through the lumen. It is absent in veins. (cid:120) the media consists of elastic membranes and smooth muscle cells with reticular fibers and proteoglycans in between: the smooth muscle cells are responsible for the synthesis of elastic fibers, including the ielm. Ielm: the arteriole diameter is 0. 5mm or less, the intima consists of the endothelium, basement membrane, and internal elastica (elastic fibers). (cid:120)
