BIO310H5 Lecture Notes - Lecture 12: Hypotension, Cardiac Output, Baroreceptor
Document Summary
Bio310 lecture 12. 1: blood pressure physiological range has to be maintained to regulate blood flow if it falls down or is higher, then has to be corrected right away. Low blood pressure causes low blood supply to organs and mostly concern with brain because brain controls all bodily functions. Increased blood pressure poorly affects the walls of the arteries as well as capillaries which could lead to ruptures and bleeding. Immediately causes blood clotting part of positive feedback but has nothing to do with cardiovascular regulation clotting prevents further blood loss by sealing. If hemorrhage is significant, arterial and venous pressure will fall which will reduce the discharge frequency of arterial and atrial baroreceptors: releases baroreceptor inhibition of sympathetic activity vasoconstriction in arteries and veins, increasing cardiac output. Increases cardiac output and raises blood pressure: venoconstriction will maintain venous blood return.
