12. The vessel that directly controls blood flow through a capillary bed is the

Question

12. The vessel that directly controls blood flow through a capillary bed is the a. metarteriole b. capillary c venule d. systemic vein e elastic artery 13. Which of the following contains blood that is flowing at the slowest rate? a. pulmonary veins b. aorta e. systemic capillaries d. systemic arteries e superior vena cava 14, Which of the following can be quickly changed by the nervous system to affect resistance to blood flow? a. blood viscosity b. blood vessel diameter c. blood vessel length d. blood vessel permeability e. all of the above 1S. Arrange the following structures in the order that blood will encounter as it flows from the arterial side to the venous side of the systemic circuit 1. venules 2. arterioles 3. capillaries 4. elastic arteries 5. medium veins 6. large veins 7. muscular arteries a. 7, 4, 2,3, 1, 5, 6 b. 6, 5, 1, 3, 2, 7, 4 c. 5, 6, 1, 3, 2, 7, 4 d. 2, 7, 6, 3, 1, 5, 6 e. 4, 7,2, 3, 1,5, 6 16. Which of the following blood vessels has the lowest blood pressure? a. superior vena cava b. aorta c. systemic capillary d. common carotid artery e. systemic arteriole

Explanation / Answer

Ans

12)

A

Metarteriole directly controls blood flow through a capillary bed.

13)

C

Systemic capillaries has blood flow at the slowest rate.

14)

E

All these factors affect resistance to blood form.

These are : -

Blood viscosity

Blood vessel diameter

Blood vessel length

Blood vessel permeability

15)  

A

Order from arterial to venous end is : -

Muscular arteries - elastic arteries - arterioles - capillaries - venules - medium veins - large veins

16)

C

Systemic capillaries has lowest blood pressure.

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