Control of Heart Rate

Contol of Heart Rate

The control of heart rate is a negative feedback system:

• Coordinator - region of the brain called the medulla
  • the autonomic nervous system is responsible for controlling heart rate to meet the varying oxygen demands  
• Receptors - walls of the aorta and carotid arteries
  • detect changes in blood pressure and pH of blood (due to increased carbon dioxide concentrations

• The contraction of the ventricle supplies cells with oxygen and glucose, while also removing carbon dioxide
• Thus the heart rate must be responsive to the body's varying demands
• High concentration in the blood means a high rate of aerobic respiration
• Increasing the heart rate means increasing the rate of carbon…