Experiment to Measure the Heart Rate and Ventilation Rate Before, During and After Moderate Exercise
2136 words 9 pagesHuman Biology Unit 2 Assignment
Carry out an experiment to measure the heart rate and ventilation rate before, during and after moderate exercise.
I predict that during exercise the heart and respiratory rate (RR) will increase depending on the intensity of exercise and the resting rates will be restored soon after exercise has stopped. I believe that the changes are caused by the increased need for oxygen and energy in muscles as they have to contract faster during exercise. When the exercise is finished the heart and ventilation rates will gradually decrease back to the resting rates as the muscles’ need for oxygen and energy will be smaller than during exercise.
1. To start with the …show more content…
Thereafter it continues to rise by 40 BPM and 8 RR. We did however experience a higher respiratory rate in the second lot of results in exercise 4 where the respiratory rate did rise by 12 RR.
During exercise, the subject’s heart rate, systolic blood pressure, and their cardiac output (the amount of blood pumped per heart beat) all increase to maintain a state of balance, known as homeostasis. Homeostasis is a self-regulating process by which the human body maintains internal stability under fluctuating environmental conditions.
Blood flow to the subject’s heart, their muscles, and their skin increase. Sweat glands secrete a salty solution that evaporates from the skin, taking heat with it. Their body's metabolism becomes