Tissue Physiology Lab Report

When comparing the results of each subject in a group, they show that the control, or the subject that had no fluid intake during the experiment had very less or no fluid output in every 20 minutes unlike the subject that had about 5ml/kg-1 of water intake. The results also show that caffeine and exercise affect the amount of urine produced in different ways: the caffeine seems to increase the total amount of urine that is produced while exercise decreases the total amount of urine produced. This is due to the ADH (Antidiuretic Hormone) that is present in the blood. With caffeine, ADH is inhibited, hence the increase of fluid output. This means that the caffeine prevents ADH from working and with exercise, the ADH is secreted, hence the decrease in fluid output and this means that a volume of water could have been lost through sweat due to the amount of energy that was required to cycle. Healthline, (2015) …show more content…
Subject 3 had a slight decrease from the start point but had an increase from 40 to 80 minutes due to the volume of water that was ingested. Subject 4 had an increase in fluid output due to the amount of water they ingested but however, there was a decrease in the output volume after 60 minutes because of the exercise that the subject undertook. For subject 5, there was an increase in volume for the urine output and this is because of the caffeine in the coffee. There was also a rapid decrease and this could be because most people who participated in the experiment were already used to daily intake of caffeine and this is why the graph shows a decrease in the