Question

How does the blood flow change with external temperature changes?

How does skin blood flow change with exercise?

How does exercise influence oxygen requirements?

Answer 1

1. When your body temperature become warmer,
the temperature will detected by thermoreceptor in the skin and mucous membrane. Then, that impulse will transferred to the hypothalamus as
temperature control in the brain. Then, that
impulse get transferred to the nerve to do vasodilation by dilate blood vessels. Blood
flow rate will slow down and body temperature can be cooled down. So when the temperature become cooler, the blood vessels performs vasoconstriction by narrowing. Blood flow
rate will speed up and warm our body.

2. When body temperature rises, skin blood flow (SkBF) increases to effect transfer of metabolic heat from the core to the skin. This convective heat transfer is never more important than during dynamic exercise.

3. The increase in heart rate stimulates your breathing rate. With an increase in heart rate, your blood pumps through your muscles at a faster rate, leaving less time for oxygen uptake. Having more oxygen available in the blood, from a faster breathing rate, helps the muscles get the amount they need. It is normal to get breathless during exercise. However, regular exercise can increase the strength and function of your muscles, making them more efficient. Your muscles will require less oxygen to move and they will produce less carbon dioxide. Exercise will improve your overall physical and psychological well-being.