Exam 8: Muscle Physiology

Which of these pairs contains the two determinants of mean arterial pressure?

More blood is delivered to the tissues during ventricular systole than during ventricular diastole.

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.) a.arteries b.arterioles c.capillaries d.veins e.lymphatics -major resistive vessels

Which of the following local factors does NOT produce the relaxation of arteriolar smooth muscle?

If driving pressure is constant, flow will double when the radius increases by twofold.

What are the roles of the lymphatic system in relation to the cardiovascular system?

Velocity of blood flow is slowest in the veins because the blood must move uphill against gravity in these vessels.

Glucose is actively transported across the capillary walls.

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.) a.arteries b.arterioles c.capillaries d.veins e.lymphatics -portion of the circulatory system through which the velocity of blood flow is the slowest

Organs that recondition the blood normally receive considerably more of the cardiac output than is necessary to meet their metabolic needs.

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.) a.arteries b.arterioles c.capillaries d.veins e.lymphatics -act as a pressure reservoir to drive blood forward throughout the vasculature during cardiac diastole

Decreased stroke volume _____ heart rate.

For blood pressure recorded as 118/76 mmHg, match the correct values, labelled a. through e., with the pressures in question. a.118 mmHg b.42 mmHg c.97 mmHg d.76 mmHg e.90 mmHg -What is the systolic pressure?

The effective circulating volume is reduced when blood collects in distended varicose veins.

Which of these terms is the pressure measured in the arteries just before the next ventricular ejection of blood?

Arteriolar resistance is regulated by both local controls and extrinsic controls.

Venous capacity depends on the ____________________ of the vein walls.

Increased total peripheral resistance _____ the mean systemic arterial blood pressure.

The main process by which exchange of solutes occurs between the blood and interstitial fluid at the capillary level is passive diffusion down concentration gradients.

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. -expanded plasma volume due to excessive fluid intake