Exam 8: Muscle Physiology

Match the terms, labelled a. through d., with the correct characteristics. a.reactive hyperaemia b.active hyperaemia c.pressure autoregulation d.extrinsic control -increase in blood flow to a tissue that occurs after removal of an occlusion of its blood supply

Which of the following is NOT a characteristic feature of capillaries?

A metarteriole is located between an arteriole and a venule.

The capillaries have an overall, tremendous cross-sectional area.

Given the following forces acting at a given point across the capillary wall, what type of fluid movement will be taking place at that point? capillary blood pressure = 32 mmHg Plasma-colloid osmotic pressure = 23 mmHg Interstitial fluid hydrostatic pressure = 1 mmHg Interstitial fluid-colloid osmotic pressure = 0 mmHg

Decreased venous radius _____ the venous return.

Match the terms, labelled a. through d., with the correct characteristics. a.reactive hyperaemia b.active hyperaemia c.pressure autoregulation d.extrinsic control -local arteriolar mechanisms that are aimed at keeping tissue blood flow fairly constant in spite of rather wide deviations in mean arterial driving pressure

Which two pressures act to move fluid into capillaries?

Which of these factors does NOT positively affect blood pressure?

Which of these statements does NOT correctly describe nitric oxide?

Decreased arteriolar radius _____ the blood flow through the arteriole.

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 radius of a vessel

Two features of arteries are ____________________ and ____________________.

____________________ are structures in veins that prevent the blood from flowing backward.

Increased sympathetic nerve activity _____ the venous radius.

The regulation of blood flow in the arterioles of the brain is under the control of mainly the sympathetic nervous system.

Increased parasympathetic nerve activity _____ the strength of cardiac ventricular contraction.

Which of these statements describes why increased respiration within a tissue leads to vasodilation of arterioles?

Which of these conditions may NOT cause hypertension?

Vasoconstriction refers to a decrease in the radius of a vessel.