Dive Response Lab Report

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Effect of Breathing on the Dive Response
INTRODUCTION
Humans and other air-breathing animals have developed a physiological mechanism to conserve oxygen when under water, this mechanism is called a dive response. This reflex is believed to be evolutionary developed to give more protection and increase survival when air-breathing animals go into water whether intentionally or otherwise. Humans may not need this mechanism as much as other animals because of inventions such as scuba gear, oxygen tanks, snorkels, etc. nonetheless, we still have it because of our primitive beginnings.
The characteristics of a human dive response are bradycardia, selective peripheral vasoconstriction, and increased blood flow to the body’s most vital organs (Duprez …show more content…

Participants were also informed about the tasks they would be asked to complete. Subjects would participate in two trials* one trial would be the classis dive response test with facial submersion and apnea the other trial being face submersion with breathing. Using a bucket that held about 3 gallons of water, the bucket was filled up with 6-7inches of water. This allowed enough room for the subject to fully submerse the face to ensure stimulation of the vagus nerve. The water was then chilled to 15 degrees Celsius. iWork’s Labscribe 3 software was used to record the subject’s data using a pulse plethysmography and a respiration monitor. This was plugged in and activated to ensure functioning before patient arrived. Once subject was briefed, the pulse plethysmography was attached to the first or middle finger of their left hand to measure heart rate. The subject was asked to keep this hand at their side, hanging freely, with minimal movement to get the best reading. The respiration monitor was then placed at the bottom of the sternum approximately 1inch above the diaphragm to measure breath rate. The first set of measurements was taken after the subject was seated, calm, and breathing normally. This set of data established the

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