ANP 1105 Chapter Notes - Chapter 19: Vasomotor Center, Renal Artery, Adrenal Medulla

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

Document Summary

Anp1105 a dr. joanne savory and dr. m zeroual. Maintenance of bp requires cooperation btwn heart, blood vessls, and kidneys all are supervised by brain. 3 main factors influencing bp are: cardiac output (co = hr x sv), peripheral resistance (r), blood volume. Sv is affected by venous return (edv); hr is maintained by medullary centers via parasympathetic vagus nerves maintaining resting hr; r is effected mostly by vessel diameter. Factors can be affected by short-term regulation: neural controls and hormonal controls; or. Long-term regulation renal controls (alter bv via the kidneys) Most neural controls operate via reflex arc involve cardiovascular centers of medulla (baroreceptors, occasionally chemoreceptors, and higher brain centers: role of cardiovascular center composed of clusters of sympathetic neurons in medulla; consists of: Cardiac centers cardioinhibitory and cardioacceleratory centers. Vasomotor center: controls diameter of blood vessels by sending steady impulses via sympathetic efferents, vasomotor fibers.