19. Cardiovascular System: Blood Vessels

Blood flow would be increased by __________.

Which of the following would experience increased blood flow during exercise?

Which of the following is the major force generating blood flow?

Total peripheral resistance a. is inversely proportional to the length of the vascular bed, b. increases in anemia, c. decreases in polycythemia, d. is inversely related to the diameter of the arterioles.

Cardiovascular function is regulated by all of the following except (a) local factors, (b) neural factors, (c) endocrine factors, (d) venous return, (e) conscious control.

Blood is transported through the venous system by means of (a) skeletal muscle contractions, (b) decreasing blood pressure, (c) the respiratory pump, (d) a and c.

The most important factor in vascular resistance is (a) the viscosity of the blood, (b) the diameter of the lumen of blood vessels, (c) turbulence due to irregular surfaces of blood vessels, (d) the length of the blood vessels.

What cardiovascular changes occur at birth?

Multiple Choice More than one choice may apply. Using the figure, determine which vessels have the most resistance. a. arteries b. veins c. capillaries d. arterioles e. venules

Which of the following conditions would have the greatest effect on peripheral resistance? (a) doubling the length of a vessel, (b) doubling the diameter of a vessel, (c) doubling the viscosity of the blood, (d) doubling the turbulence of the blood, (e) doubling the number of white cells in the blood.

How does the control of blood flow to the skin for the purpose of regulating body temperature differ from the control of nutrient blood flow to skin cells?

How do pressure and resistance affect cardiac output and peripheral blood flow?

Why is blood flow to the brain relatively continuous and constant?

Two elements determine blood pressure—the cardiac output of the heart and the peripheral resistance, or friction, in the blood vessels. Name two factors that increase cardiac output. Name two factors that increase peripheral resistance.

Compare the effects of the cardioacceleratory and cardioinhibitory centers on cardiac output and blood pressure.

Bob is sitting outside on a warm day and is sweating profusely. Mary wants to practice taking blood pressures, and he agrees to play the patient. Mary finds that Bob's blood pressure is elevated, even though he is resting and has lost fluid from sweating. (She reasons that fluid loss should lower blood volume and, thus, blood pressure.) Why is Bob's blood pressure high instead of low?