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Blood Vessels and Circulation
Multiple Choice

1 .       An increase in cardiac output normally occurs during: [Hint]



2 .       The central regulation of cardiac output primarily involves the activities of the: [Hint]



3 .       Atrial natriuretic peptide (ANP) reduces blood volume and pressure by: [Hint]



4 .       From the following selections, choose the answer that correctly identifies all the factors which would increase blood pressure. (Note: CO = cardiac output; SV = stroke volume; VR = venous return; PR peripheral resistance; BV = blood volume.) [Hint]



5 .       The most important determinant of peripheral resistance is: [Hint]



6 .       The two major factors affecting blood flow rates are: [Hint]



7 .       The distinctive sounds of Korotkoff heard when taking the blood pressure are produced by: [Hint]



8 .       Of the following blood vessels, the greatest resistance to blood flow occurs in the: [Hint]



9 .       The "specialized" arteries that are able to tolerate the pressure shock produced each time ventricular systole occurs and blood leaves the heart are: [Hint]



10 .       The unidirectional flow of blood in venules and medium-sized veins is maintained by: [Hint]



11 .       The only blood vessels whose walls permit exchange between the blood and the surrounding interstitial fluids are: [Hint]



12 .       One of the major characteristics of the arteries supplying peripheral tissues is that they are: [Hint]



13 .       Smooth muscle fibers in arteries and veins are found in the: [Hint]



14 .       The layer of vascular tissue that consists of an endothelial lining and an underlying layer of connective tissue dominated by elastic fibers is the: [Hint]



15 .       Stimulation of the vasomotor center in the medulla causes _______ and inhibition of: [Hint]



16 .       The three primary interrelated changes that occur as exercise begins are: [Hint]



17 .       The only area of the body where the blood supply is unaffected while exercising at maximum levels is the: [Hint]



18 .       The three elastic arteries that originate along the aortic arch and deliver blood to the head, neck, shoulders, and arms are the: [Hint]



19 .       The large blood vessel that collects most of the venous blood from organs below the diaphragm is the: [Hint]



20 .       The three blood vessels that provide blood to all of the digestive organs in the abdominopelvic cavity are the: [Hint]



21 .       Blood homeostasis is maintained by: [Hint]



22 .       When small amounts of blood are lost, blood pressure is restored by: [Hint]



23 .       At birth, the foramen ovale closes due to: [Hint]



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