Homeostatsis and negative feedback

• Homeostasis is the maintenance of internal conditions within an organism.
• during exercise, our bodies need more oxygen • our breathing rate increases to supply the oxygen
• the heart beats faster to take oxygen to where it is needed
• once exercise stops, the body no longer needs the additional oxygen supply • the breathing rate decreases
• the heart rate reduces as the demand for oxygen falls
• increased carbon dioxide levels will quickly be detected and promptly cause an increase in heart rate
• high intensity activities such as sprinting involve several muscle groups working at a high rate, which elevates your heart rate
• the heart muscle becomes stronger and more efficient at beating