A&P II: Ch. 19 practice

which statement does NOT accurately describe veins?
always carry deoxygenated blood

smooth muscle in the blood vessel wall…
is mostly circularly arranged

peripheral resistance…
is inversely related to the diameter of the arterioles

which of the following can lead to decreased venous return of blood to the heart?
damage to the venous valves

arterial blood pressure increases in response to…
– increasing stroke volume
– increasing heart rate
– atherosclerosis
– rising blood volume

which of the following would NOT result in the dilation of the feeder arterioles and opening of the precapillary sphincters in systemic capillary beds?
local increase in pH

the structure of a capillary wall differs from that of a vein or an artery because…
it has a single tunic — only the tunica intima

the baroreceptors in the carotid sinus and aortic arch are sensitive to…
changes in arterial pressure

the myocardium receives its blood supply directly from the…
coronary arteries

blood flow in the capillaries is steady despite the rhythmic pumping of the heart because of the…
elasticity of the large arteries

Tunica Externa Elastic Fibers; the outermost tunica (layer) of a blood vessel, surrounding the tunica media. It is mainly composed of collagen and, in arteries, is supported by external elastic lamina. Tunica Media smooth muscle and elastic fibers; the middle …

arteries blood vessels that carry blood away from the heart capillaries connect arterioles to venules; smallest blood vessels in the body WE WILL WRITE A CUSTOM ESSAY SAMPLE ON ANY TOPIC SPECIFICALLY FOR YOU FOR ONLY $13.90/PAGE Write my sample …

Functions of Peripheral Circulation 1. Carries blood 2. Exchanges nutrients, waste products and gasses with tissues 3. Transport substances 4. helps regulate BP 5. Directs blood flow to tissues Arteries – Carry blood away from the heart WE WILL WRITE …

arteries the efferent vessels of the cardiovascular system, so they carry blood away from the heart veins the afferent vessels of the cardiovascular system, so they carry blood to the heart WE WILL WRITE A CUSTOM ESSAY SAMPLE ON ANY …

identify some differences between an artery vessel and a vein vessel an artery is more round and thick while veins are thin and squiggly innermost tunica, thin tunic of capillaries tunica interna WE WILL WRITE A CUSTOM ESSAY SAMPLE ON …

arteries carry blood away from heart arterioles are smallest branches of arteries WE WILL WRITE A CUSTOM ESSAY SAMPLE ON ANY TOPIC SPECIFICALLY FOR YOU FOR ONLY $13.90/PAGE Write my sample capillaries are smallest blood vessels, location of exchange between …

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