Lab 4 - Human Cardiovascular

Reflex negative feedback prevents large changes in map

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: – sensory receptors found in the aortic arch and carotid sinus Baroreceptors – send information to the medullary cardiovascular center in the brain th Monitor blood pressure by sensing stretch Active at normal arterial pressures and supply steady input to the central integration centers input to the central integration centers Changes in pressure result in an appropriate response in sympathetic and parasympathetic response in sympathetic and parasympathetic activity activity The Baroreflex and Decreases in Arterial Pressure Decrease in Blood Pressure = Decrease in firing of Baroreceptors due to decrease in stretch of the arterial Baroreceptors due to decrease in stretch of the arterial vessels vessels Medullary Cardiovascular Centers signals increase in Cardiovascular Centers signals increase in sympathetic sympathetic activity and decrease in parasympathetic activity Sympathetic Activity Increase – Vasoconstriction of Vasoconstriction Arterioles Arterioles and Veins Parasympathetic Activity Decrease – Increases Heart Rate Rate Shepherd, JT and VanHoutte, PM: The Human Cardiovascular System, Facts and Concepts. New York, Raven Press, 1979 Increase in TPR Increase in TPR Increase in Venous Return Increases CO Increases SV Increases SV Overall Effect Incre...
View Full Document

Ask a homework question - tutors are online