Exam 9: Vascular Physiology

Which of the following is NOT a characteristic feature of capillaries

Match the effects, labelled a. through d., with the events in question. (Options may be used more than once or not at all.) -increased release of vasopressin

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

Decreased rate of firing in afferent nerves reaching the cardiovascular control centre _____ the sympathetic nerve activity to the cardiovascular system.

Match the types of vessel, labelled a. through e., with the function(s) they perform. (Options may be used more than once or not at all.) -act as a pressure reservoir to drive blood forward throughout the vasculature during cardiac diastole

Match the effects, labelled a. through c., with the change(s). (Options may be used more than once or not at all.) -increasing the length of a vessel

Match the types of vessel, labelled a. through e., with the function(s) they perform. (Options may be used more than once or not at all.) -serve as low-resistance passageways from the tissues to the heart

What haemodynamic changes occur when an individual goes from a resting state to an active state

Due to contraction of its smooth muscle layer, an artery ensures that blood flows constantly.

Indicate the relative comparison of each of the paired items using the appropriate letter,a.,b., or c.(Options may be used more than once or not at all.) a.A is greater than B. b.B is greater than A. c.A and B are equal. a.blood flow through an arteriole upon increased sympathetic activity B.blood flow through an arteriole upon decreased sympathetic activity a.blood flow through a vein upon increased sympathetic activity B.blood flow through a vein upon decreased sympathetic activity a.velocity of blood flow through the veins B.velocity of blood flow through the capillaries a.local arteriolar radius in the presence of local decreased O₂ concentration and increased CO₂ concentration B.local arteriolar radius with normal local concentration of O₂ and CO₂ a.circulation through the skin during exercise B.circulation through the skin at rest a.circulation to the brain at rest B.circulation to the brain during an examination a.net ultrafiltration pressure at the arteriolar end of the capillary B.net reabsorption pressure at the venous end of the capillary

There is normally a net loss of fluid from a capillary at its arteriolar end.

Increased sympathetic nerve activity _____ the venous radius.

A local increase in potassium increases the vasodilation of arterioles.

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

Which of these tissues does NOT have increased blood flow during exercise

Oedema, venous pooling, and a reduction in cardiac output are consequences of standing still for a long time.

Increased arteriolar radius _____ the total peripheral resistance.

Match the arteriolar effects, labelled a. through c., with the tissues in question. (Options may be used more than once or not at all.) -application of ice to a sprained ankle

Increased parasympathetic nerve activity _____ the heart rate.

Match the effects, labelled a. through d., with the events in question. (Options may be used more than once or not at all.) -increased release of aldosterone