20081015 II

20081015 II - Lecture 20a Cardiovasular Integration page #1...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 20a Cardiovasular Integration page #1 Lecture20a C ARDIOVASCULAR I NTEGRATION 1. Baroreceptors monitor blood pressure. 2. Chemoreceptors monitor CO 2 and O 2 and pH of blood on its way to brain. 3. Muscle afferents monitor changes in skeletal muscle activity. 4. Cardiac mechanoreceptors: both atrial and ventricular heart rate, volume or both are monitored. Medullary cardiovascular control center integrates information from the above and from other systems and higher brain centers. Output is fed to sympathetic and parasympathetic centers which stimulate the heart and vessels. Pressor center: sympathetic activation Æ blood pressure Depressor center: parasympathetic Æ blood pressure Baroreceptors monitor blood pressure: stretch Æ firing rate (usually) physiological range Location: beginning of internal carotid (carotid sinus) and aortic arch as well as throughout the body. Nearby sympathetic nerve endings may control sensitivity. types: unmyelinated Æ blood pressure when stimulated myelinated (found in mammals) Æ blood pressure
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lecture 20a Cardiovasular Integration page #2 Chemoreceptors monitor O 2 , CO
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

20081015 II - Lecture 20a Cardiovasular Integration page #1...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online