ANP 1105 Lecture Notes - Lecture 18: Sphygmomanometer, Vascular Smooth Muscle, Angiotensin

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Joanne Savory

Document Summary

The kidneys (1) direct action: increased blood volume/pressure = increased rate of filtrate formation insufficient time to reclaim water increased volume of urine which decreases the blood volume and pressure. *hormone independent (2) indirect action: renin-angiotensin system - map decreases kidney cells release renin cascade of reactions to yield angiotensin. R varies 1/r4: organs regulate individual blood flow by varying resistance of arterioles. Capillary exchange mechanisms: vesicle transport: for relatively large, lipid-insoluble molecules (eg: insulin) - too big for channels and water soluble molecules. 6 if nfp = positive = filtration: overall deficit of 1-2 mm hg some fluid (3-4 ml/min) lost to tissues - returned by lymphatic system. The blood vessels: arteries of the head and neck (19. 22b, brachiocephalic trunk = bottom large, common carotid = upper branch of brachiocephalic trunk, external carotid = front branch of common carotid.