Exam 8: Muscle Physiology

Match the arteriolar effects, labelled a. through c., with the tissues in question. (Options may be used more than once or not at all.) a.would produce arteriolar vasoconstriction b.would produce arteriolar vasodilation c.would not cause any change in arteriolar calibre -parasympathetic discharge on skeletal muscle arterioles

Which of these factors is most important in matching the blood flow through a specific tissue with the metabolic needs of that tissue?

There is a constant flow of blood through the capillaries even though the heart is forcing blood out into the arterial system only part of the time.

The skeletal muscle pump adds to the effect of gravity on the venous system.

Match the effects, labelled a. through e., that the changes in question would have on bulk flow. (Options may be used more than once or not at all.) a.The change would increase ultrafiltration and decrease reabsorption. b.The change would decrease ultrafiltration and increase reabsorption. c.The change would increase both ultrafiltration and reabsorption. d.The change would decrease both ultrafiltration and reabsorption. e.The change would not alter ultrafiltration and reabsorption. -rise in capillary blood pressure in connection with congestive heart failure

A capillary wall has a measured thickness of about one ____________________.

Baroreceptors are most sensitive to changes in which of the following factors?

Match the effects, labelled a. through c., with the change(s). (Options may be used more than once or not at all.) a.This change would increase blood flow. b.This change would decrease blood flow. c.This change would have no effect on blood flow. -increasing the number of circulating red blood cells

When blood pressure falls below normal, what happens to restore the blood pressure toward normal?

Match the arteriolar effects, labelled a. through c., with the tissues in question. (Options may be used more than once or not at all.) a.would produce arteriolar vasoconstriction b.would produce arteriolar vasodilation c.would not cause any change in arteriolar calibre -application of ice to a sprained ankle

Increased venous radius _____ the blood flow through the vein.

Cardiac contraction induces blood flow in the arterial system, but it has no influence on blood flow in the veins.

Plasma proteins are responsible for the plasma-colloid osmotic pressure.

Which of the following statements correctly describes pulse pressure?

Resistance to blood flow increases as the viscosity of the blood increases.

Organs that do not adjust the blood are more vulnerable to reductions in blood flow than are organs that perform homeostatic functions on the blood.

Which of the following is NOT a short-term adjustment for blood pressure?

The sphygmomanometer and stethoscope can be used for a direct measurement of arterial blood pressure.

Because the arteries have large radii, they serve as excellent rapid-transit passageways for blood. What is their second function-which is related to their elasticity-in maintaining blood flow during diastole?

Using F = P/R, as resistance increases, the flow increases if the pressure is constant.