AH 2330 Lecture Notes - Lecture 10: Natriuresis, Adrenergic Receptor, Sympathetic Nervous System
Document Summary
Arteriole regulation i. happens at 2 different levels by different mechanisms ii. some factors come from the vessels themselves: intrinsic iii. some factors from outside the vessels: extrinsic iv. mechanisms: Caused by intrinsic coming from the tissue itself all local controls. Autonomic nervous system: neural (reflex) control: extrinsic. Sympathetic nervous system stimulation releases epinephrine which binds to alpha-adrenergic receptors on peripheral arterioles. Causes vasoconstriction which in response to sympathetic stimulation can cause an increase in total peripheral resistance by reducing the size of the blood vessel: hormonal control mechanisms role in controlling the arteriole. Smooth muscle dilates in response to camp which makes it different than cardiac. can contribute to overall blood pressure regulation inside the body that mean arteriole. Beta receptors increase cyclic amp (camp) and skeletal muscle which contract in response to an increase in camp. Sympathetic stimulation of beta-receptors cause arteriole to vasodilate because (elps point out parasympathetic nervous system does not play an important.
