Question 1: How does the insulin and glucagon secreted by the pancreas function in glucose metabolism?

Question 2: How do the cardiovascular and respiratory system work together to deliver blood to the body tissues?

Question 3: The body experiences some stressor such as exercise, fright, or emotional stress whether it be joy or sorrow. There are certain hormones like epinephrine and norepinephrine that are produced during these stressful events. These hormones are produced by the adrenal gland, and they will have an effect on the heart rate and breathing rate. Explain how the hormones produced by the adrenal could play a role in altering the respiratory and heart rates during exercise.