Exercise 5: Activities 1, 3, and 4 Activity 1 Questions: Studying the Effect of Blood Vessel Radius on Blood Flow Rate 1. Blood flow is measured in - ml/min 2. Which of the following has the greatest effect on blood flow? - blood vessel radius 3. Which of the following would not result in a decrease in the blood vessel radius? - vasodilation 4. The diameter of the blood vessel is the same as - two times the radius of the blood vessel 5. The opening of the blood vessel where the blood flows is called the - lumen 6. What is the driving force for blood flow? - Pressure gradient 7. What do you think will happen to the flow rate if the radius is increased by 0.5 mm? 8. How does the body increase the blood vessel radius? - smooth muscle relaxation 9. Do you think a graph plotted with radius on the X-axis and flow rate on the Y-axis will be linear (a straight line)? - no .... and wasn't 10. The variable that you altered in this activity was - vessel radius 11. Vessel radius and fluid flow - are directly proportional 12. After a heavy meal, when we are relatively inactive, we might expect blood vessels in the skeletal muscles to be somewhat ------ and the blood vessels in the digestive organs to be somewhat ------. - constricted, dilated 13. When you increase the flow tube radius, the fluid flow rate -increased 14. Explain how the body establishes a pressure gradient for fluid flow. - By heart construction, the pressure gradient is established.
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- Spring '08
- Hematology, Effect of Blood Vessel Radius