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Blood Flow - Answers |
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- During exercise what happens to the flow of blood?
- The speed of blood flow increases
- Blood is distributed to the working muscles and away from the organs not being used
- Blood pressure in the arteries rises
- Blood pressure in the veins may fall if venous return is not sufficient
- What is the definition of blood pressure?
- The force exerted by the blood against the vessel walls
- Where in the circulatory system is blood pressure at its highest?
- What is the difference between vasomotor control and venomotor control?
- Vasomotor control is the regulation of blood pressure in the arteries by constriction and relaxation of the vessel walls
- Venomotor control is the regulation of the blood pressure in veins by changing the venomotor tone of their walls to alter their shape
- Name at least 4 mechanisms which aid venous return
- Pocket valves
- Muscle pump
- Smooth muscle
- Respiratory pump
- Gravity
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