Lab Report 3

Lab Report 3 - Wednesday 8am Lab Cardiovascular Physiology...

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Wednesday 8am Lab Cardiovascular Physiology Introduction: The purpose of this lab is to determine the effects of changing pressure, breathing patterns, and body position on heart rate and cardiac output. The first part of the experiment involved constricting the carotid arteries, which should cause the heart to increase the rate at which it pumps in order to make up for the constriction placed upon the blood vessels in order to keep the flow rate constant. The second part of the experiment is the Valsalva maneuver, which increases the pressure on the heart but decreases oxygen in the lungs. This should cause an increase in heart rate in order to combat the difficulty presented by the pressure on the heart obstructing the vena cava from returning blood to it. The last part of the experiment involves sitting up suddenly, which should increase heart rate since laying down the heart does not have to work as hard against gravity to pump blood throughout the body. Methods:
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This note was uploaded on 04/28/2008 for the course NPB 101L taught by Professor Goldberg during the Spring '08 term at UC Davis.

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