Cellular Respiration Lab

Nadia Hoque 11/3/16 821 Austin, Tania, Sherman
Cellular Respiration and Exercise In this lab we try and figure out the effects of exercise on cellular respiration, and identify a role of carbon dioxide production, breathing rate, and heart rate in determining the rate of cellular respiration. To do this we made a Phenol Red solution and used a straw to blow into it with no exercise to see how long it would take for the color of the Phenol Red solution to change, after this we measured our heart, and breathing rate. Then we did these same steps again after 1 minute, then another 2 minutes of exercising (Note: This lab was incomplete). The problem of this lab is “ How will carbon exercising, and increased carbon dioxide production affect the color of the Phenol Red, our heart rate, and our breathing rate. I hypothesize that if we exercise then we will affect our cellular respiration, and cause the Phenol Red to change color in a faster rate, because when we exercise we breathe heavily resulting in a higher carbon dioxide production which will cause the Phenol Red to change at a faster rate.

The materials that were used during this lab were:
Beaker/test tube/cup
Bromothymol blue solution or Phenol Red
Straw

The first thing we did was create the Phenol Red Solution which was 20 ml of water and 8 drops of Phenol Red. Then we used a straw and exhaled into the solution and counted how many second it took for the color to change and we recorded that. Then we measured our heart and breathing rates by counting how many times we took a breath in one minute, and how many beats we had in 30 seconds. After this we exercised for 1 minute and repeated the steps from before, and recorded the results. Then we exercised for 2 minutes and repeated the steps from earlier and recorded those