Question

QUESTION 12

1. Local control of arteriolar resistance leads to an increase in blood flow to a tissue when

   		oxygen level increases.
   		H+ level decreases.
   		carbon dioxide level increases.
   		pH increases.

2 points (Extra Credit)   

QUESTION 13

1. Which of the following is/are correct for arteries but NOT veins?

   		carry low-oxygen blood
   		act as a volume reservoir
   		have low blood pressure
   		store pressure generated by the heart

2 points   

QUESTION 14

1. Mean arterial pressure is determined by

   		total blood volume.
   		All of the alternatives.
   		resistance of the arterioles.
   		heart rate.

2 points   

QUESTION 15

1. During rest, arterioles are under ________ control from the sympathetic branch of the autonomic nervous system.

   		tonic
   		competitive
   		feedforward
   		antagonistic

2 points   

QUESTION 16

1. Blood flow velocity is slowest in the

   		arterioles.
   		aorta.
   		capillaries.
   		venules.

2 points   

QUESTION 17

1. Which of the following accounts for the increase in blood flow to skeletal muscle during exercise

   		baroreceptor reflex
   		active hyperemia
   		reactive hyperemia
   		vasovagal syncope

2 points   

QUESTION 18

1. Which of the following vessels undergo changes in diameter based on neural input?

   		arterioles and capillaries
   		arterioles and veins
   		Capillaries and veins
   		Only capillaries

2 points   

QUESTION 19

1. Plasma proteins decrease in a person with liver failure. What effect does this have on capillary filtration/absorption?

   		net filtration decreases
   		net filtration increases
   		no effect on capillary fluid exchange

Answer 1

12. C. Co2 level increases

oxygen causes vasoconstriction

co2 and decreased ph causes vasodilation

13.. store pressure generated by the heart

all above three options are characteristic of veins

14. C. Resistance of the arterioles

15. A. Tonic

16. D. Venules

17. B. Active hyperemia

18.a. Arteriolar and capillaries

19. B. Net filteration increases

19.