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Cellular Respiration Lab Report

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Scientific Report Name: Joh Sturdy

Title: To investigate the effect of exercise on breathing.

Aim: The aim of this experiment is to find out the effect of exercise on the respiratory system
Introduction:

During exercise, our muscle cells respire more than when we are resting. Exercise is carried out by increasing the respiration rate and the heart rate. (BBC Bitesize 2014) Exercise occurs when the muscles contract and relax which create movement.

Energy for cells is created in the mitochondria of every cell, through the process of cellular respiration
(Glucose + Oxygen -----> Carbon Dioxide + Water + ENERGY). The Mitochondria is known as the "powerhouse" of all cells and they act like …show more content…
When the oxygen enters the body, it travels down the trachea, more commonly known as the wind pipe, and then into the right and left bronchi. Then from the bronchi, the oxygen travels into the lungs and is distributed into the many tree branch like pipes called bronchiole. The oxygen is then taken into the alveoli where the oxygen is distributed into the red blood cells. These red blood cells take the oxygen to the muscles for cellular respiration. This entire process is done almost instantaneously. (Sharecare Inc. …show more content…
The second graph supports our second hypothesis because except for 1 increase at 2 minutes, the Respiration rate did decrease by around 5 BPM every minute. This is shown in the second graph, Figure 2: the effect of time on RR after Exercise. This occurs because when the body is exercising at the top rate, the heart is not able to pump enough blood around to the muscles to get the oxygen for aerobic respiration, so the muscles resort to anaerobic respiration which still creates energy but very little and also creates a waste product called lactic acid, which needs at least 5 minutes to remove the built up toxic acid.

If the heart rate could be measured during and after exercise, It is predict that the same type of pattern would occur, because during exercise the heart needs to pump around more blood to get more oxygen to the muscles so we would start with the average heart rate for children 11-17 being 80BPM and if my calculations are correct, the heart rate increasing to 160BPM after exercise. The body would then take around 5 minutes to return back to normal because it needs to remove all the lactic acid build up before going back to

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