Physiology 2130 Lecture Notes - Lecture 6: Sympathetic Nervous System, Parasympathetic Nervous System, Baroreflex
23 Dec 2015
School
Department
Course
Professor
Document Summary
In a fight or flight situation you"ll activate the sympathetic nervous system causes release of epinephrine from adrenal glands o. Neural mechanisms: the ans and control of blood flow, the baroreceptor reflex. Hormones take longer but they have longer lasting effects. Autonomic nervous system causes changes very rapidly because it sends changes from nerves. Sympathetic nervous system also innervates blood vessels the body: parasympathetic nervous system (decreased heart rate and stroke volume) Small indirect effect on blood vessels causing a weak vasodilation throughout o. When you activate pns you shut off sns which shuts off constriction. Big negative feedback system that helps maintain blood pressure throughout the body. Mean arterial pressure (map) is the average pressure throughout the entire. Co is cardiac output (co = hr x sv) Tpr = total peripheral resistance (all the resistance encountered by the. Where o o blood in the entire systemic circulation) Radius of the vessels dramatically effects peripheral resistance.
