Ch. 19

nessaram994's version from 2017-10-21 22:00

Section 1

Question Answer
1. Which of the following is in logical order? a) Heart arteries  arterioles  capillaries  venules  veins  heart b) Lungs arteries  arterioles  capillaries  venules  veins  lungs c) Heart arteries  arterioles  capillaries  venules  veins  lungs d) Lungs arteries  arterioles  capillaries  venules  veins  Hearta)Heart arteries  arterioles  capillaries  venules  veins  heart
2. Capillary walls consist of a __________. a) Tunica intima b) Tunica media c) Tunica externa d) All of the thesea)Tunica intima
3. All of the following would be found in large arteries except _______. a) elastic tissue b) smooth muscle c) endothelium d) valvesd) valves
4. The aorta is classified as a(n) ________. a) Arteriole (resistance) artery b) Elastic (conducting) artery c) Muscular (distributing) artery d) None of these b)Elastic (conducting) artery
5. These vessels carry blood toward the heart. a) Arterioles b) Capillaries c) Arteries d) Venulesd) Venules
6.Of the following, what is the best definition of veins? a) Carry oxygenated blood b) Carry blood away from the heart c) Carry deoxygenated blood d) Carry blood toward the heart d)Carry blood toward the heart
7. Of the following blood vessel components, which is the most critical in regulating systemic blood pressure? a) Tunica intima b) Tunica media c) Tunica externa d) Venous valvesb) Tunica media
8. An increasing lumen diameter is termed _________, and occurs when smooth muscle _________. a) vasodilation, relaxes b) vasodilation, contracts c) vasoconstriction, relaxes d) vasoconstriction, contracts a)vasodilation, relaxes
9. Of the following vessel types, which are responsible for the exchange of gases and nutrients with tissues? a) Arteries b) Arterioles c) Capillaries d) Veinsc) Capillaries
10. True or false: Vascular shunts of capillaries are examples of arteriovenous anastomoses.True
11. Of the following cardiovascular components, which contains the majority of the body's blood volume at any one time? a) Pulmonary capillaries b) Heart c) Systemic veins and venules d) Systemic capillaries c)Systemic veins and venules
12. Some of the least permeable capillaries are found in the ________, while some of the most permeable capillaries are found in the ________. a) kidney; brain b) intestine; muscles c) bone marrow; brain d) brain; bone marrow d) brain; bone marrow

Section 2

Question Answer
13. A healthy elastic artery ________. a) is compliant b) reduces blood flow c) is a resistance artery d) has a thin wall and irregular lumen a)is compliant
14. Predict the change in peripheral resistance as blood vessel diameter increases. a) Peripheral resistance decreases. b) Peripheral resistance increases. c) Peripheral resistance remains unchanged. d) Peripheral resistance is constant in humans.a)Peripheral resistance decreases
15. Which of the following statements is true? a) The longer the vessel, the lower the resistance and the greater the flow. b) As blood volume decreases, blood pressure and blood flow also decrease. c) Increased viscosity increase blood flow d) All of the above are true b)As blood volume decreases, blood pressure and blood flow also decrease
16. Blood flow is inversely proportional to the ________. a) cardiac output b) peripheral resistance c) difference in blood pressure d) diastolic pressure b)peripheral resistance
17. Which of the following blood vessel types have the greatest effect on peripheral resistance? a) Arteries b) Arterioles c) Veins d) Venulesb) Arterioles
18. The radial pulse is taken at the: a) Wrist b) Neck c) Ankle d) Temple a)Wrist
19. Which of the following can result in decreased venous return to the heart? a) An increase in blood volume b) An increase in venous pressure c) Damage to the venous valves d) Increased muscular activity c)Damage to the venous valves
20. Gaining weight may increase blood pressure because increased adipose tissue causes an increase in ________. a) blood vessel diameter b) blood vessel length c) blood viscosity d) cardiac output b)blood vessel length
21. Which of the following blood vessels exhibits the HIGHEST pressure? a) Venules b) Capillaries c) Arterioles d) Arteriesd) Arteries
22. If you have a blood pressure of 120/80 mm Hg, what is your diastolic pressure? a) 40 mm Hg b) 80 mm Hg c) 120 mm Hg d) 200 mm Hgb) 80 mm Hg
23. If you have a blood pressure of 110/80 mm Hg, what is your pulse pressure? a) 30 mm Hg b) 80 mm Hg c) 110 mm Hg d) 190 mm Hg a)30 mm Hg
24. _____________ is major cause of heart failure, vascular disease, renal failure, and stroke a) chronic hypotension b) chronic hypertension c) orthostatic hypotension d) prehypertensionb) chronic hypertension
25. True or false: In atherosclerosis, small plaques are harmless; they are dangerous only when they become large or “complicated”False

Section 3

Question Answer
26. Which of the following affect blood pressure? a) Cardiac output b) Peripheral resistance c) Blood volume d) All of the thesed) All of the these
27. During stress, the cardioacceleratory center ___________ heart rate and stroke volume via ___________ stimulation a) Decreases; parasympathetic b) Decreases; sympathetic c) Increases; sympathetic d) Increases; parasympathetic c)Increases; sympathetic
28. True or false: Short-term regulation of blood pressure is achieved primarily by alterations in cardiac output and peripheral resistance.True
29. Baroreceptors detect changes in ________. a) blood O2 levels b) stretch in arterial walls c) blood CO2 levels d) blood H+ levels e) all of the above b)stretch in arterial walls
30. In response to acute reduction of blood pressure detected by baroreceptors, which of the following actions would be dictated by the medulla to increase blood pressure? a) Vasodilation (decrease resistance) b) Decreased cardiac output c) Vasoconstriction (increase resistance) d) Reduction of heart rate c)Vasoconstriction (increase resistance)
31. Which of the following actions would be dictated by the medulla to DECREASE blood pressure? a) Reduction of heart rate b) Reduction of contractile force of heart c) Vasodilation d) All of the above d)All of the above
32. In response to increased blood volume, which of the following hormones would you expect to be released? a) Atrial natriuretic peptide b) Aldosterone c) Epinephrine d) Angiotensin IIa)Atrial natriuretic peptide
33. The renin-angiotensin mechanism stimulates the release of which hormone from the adrenal cortex? a) ADH b) Aldosterone c) Norepinephrine d) ANPb) Aldosterone

Section 4

Question Answer
34. Which of the following forces fluids out of the blood into the tissues? a) Colloid osmotic pressure b) Capillary hydrostatic pressure c) Interstitial fluid hydrostatic pressure d) Interstitial fluid osmotic pressure b)Capillary hydrostatic pressure
35. Which of the following does NOT cause vasodilation? a) Nitric oxide (NO) b) High levels of carbon dioxide (CO2) c) Low levels of oxygen (O2) d) Endothelins e) Inflammatory chemicals d)Endothelins
36.True or false: A myogenic response is best described the reflexive contraction of smooth muscle upon detection of high O2 levelsFalse
37. Vascular smooth muscle responds directly to passive stretch with: a) Vasodilation b) Increased tone c) Decreased tone d) Active stretchb) Increased tone
38. Blood flow is SLOWEST traveling through which of the following blood vessels? a) Arteries b) Arterioles c) Capillaries d) Venulesc) Capillaries
39. A decrease in O2 level in skeletal muscle would initiate an autoregulatory mechanism that would stimulate _________ in the arterioles supplying the muscle. a) vasodilation b) vasoconstriction c) constriction of the precapillary sphincters d) peristaltic wavesa)vasodilation
40. Why is vasodilation prominent in the skin when a person increases physical activity? a) It increases delivery of nutrients to the skin to induce sweating. b) Because skeletal muscles are close to the skin, they receive the oxygen via diffusion. c) Heat is dissipated across the skin from the blood to help cool the body. d) Exercise produces metabolites that induce vasodilation. c)Heat is dissipated across the skin from the blood to help cool the body.
41. True or false: due to the collective differences in hydrostatic and osmotic pressure, the net flow of fluids is out of the circulation at the arterial ends of capillary beds and into circulation at the venous ends.True
42. Veins run _______ a) Superficial only b) Both deep and superficial c) In an orderly, easy-to-follow pathway d) More than one of the above b)Both deep and superficial

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