Exercise 5 Activity 1 (from book)
1. Describe the relationship between vessel radius and blood flow rate?
2. In this activity you altered the radius of the flow tube by clicking the + and - buttons. Explain how and why the radius of blood vessels is altered in the human body.
3. Describe the appearance of your plot of blood vessel radius versus blood flow rate and the plot to the relationship between these two variables.
4. Describe an advantage of slower blood velocity in some areas of the body, for example, in the capillaries of our fingers.
Activity 2
1. Describe the effect on blood flow rate when blood viscosity was increased.
2. Explain why the relationship between viscosity and blood flow rate is inversely proportional.
3. What might happen to blood flow if you increased the number of blood cells?
Activity 3
1. Is the relationship between blood vessel length and blood flow rate directly proportional or inversely proportional?Why?
2. Which of the following can vary in size more quickly: blood vessel diameter or blood vessel length?
3. Describe what happens to resistance when blood vessel length increases.
Activity 4
1. How does increasing the driving pressure affect the blood flow rate?
2. Is the relationship between blood pressure and blood flow rate directly proportional or inversely proportional?Why?
3. How does the cardiovascular system increase pressure?
4. Although changing blood pressure can be used to alter the blood flow rate, this approach causes problems if it continues indefinitely. Explain why?
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