study guide

4 Pages
117 Views
Unlock Document

Department
Biological Sciences
Course
BIOC34H3
Professor
Stephen Reid
Semester
Winter

Description
Lecture 8 Study Notes Slide 2 Decreased Mean Arterial Pressure is sensed by the baroreceptors o Baroreceptors sense MAP pressure changes: Decrease parasympathetic activity: increasing heart rate (As parasymp decreases the Hr) Increase sympathetic activity: increases heart rate (due to pacemaker potential threshold being breeched faster); stroke volume increases [cardiac muscle cells have greater Ca; decrease time in systole],Total Peripheral Resistance increases due to vasoconstriction As a result of the above, MAP increases Slide 3 If MAP increases: o Baroreceptors sense pressure change Decrease sympathetic innervation: decreases HR, decreases stroke volume, and decreases TPR cause smooth muscles relax (vasodilation) Increase parasympathetic innervations?? The above results in decreased MAP Slide 4 We have 2 sets of baroreceptor cells: 1. Aortic arch baroreceptors: sense blood pressure changes in systematic circulation 2. Carotid sinus baroreceptors: sense blood pressure of blood flowing to the brain Slide 5 Both sets of baroreceptors innervate the medulla and NTS (cardiovascular centre) www.notesolution.com
More Less

Related notes for BIOC34H3

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit