Chapter 19 part 2

alexamartin's version from 2017-10-17 06:25

Section 1

Question Answer
A healthy elastic artery _____. A) is compliant B) reduces blood flow C) is a resistance artery D) has a thin wall of lumen A) is compliant
Predict the change in peripheral resistance blood vessel diameter increases. A) peripheral resistance increases B) peripheral resistance decreases C) peripheral resistance stays the same B) peripheral resistance decreases
which of the following statements is true? A) the longer the vessel, the lower the resistance and the greater the flow also decrease. B) As blood volume decreases, blood pressure and blood flow. C) Increased viscosity increase blood flow. D) AllB
Blood flood is inversely proportional to the _____. A) difference in blood pressure B) diastolic pressure C) cardiac output D) peripheral resistance D) peripheral resistance
Which of the following blood vessel types have the greatest effect on peripheral resistance? A) Viens B) arteries C) arterioles D) venulesC) arteriols
The radial pulse is taken at the: A) wrist B) neck C) ankle D) templeA) wrist
Which of the following can result in decreased venous return to the heart? A) an incresed in blood volume B) an incresed in venous pressure C) damage to the venous valves D) Increased muscular activity C) damge to the venous valves
Gaining weight may increase blood pressure because increase adipose tissue causes an increase in _____. A) blood vessel diameter B) blood vessel length C) blood viscosity D) cardiac output B) blood vessel length
Which of the following blood vessels exhibits the highest pressure? A) venules B) capillaries C) arterioles D) arteries D) arteries
If you have blood pressure of 120/88 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
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 HgA) 30 mm Hg
_____ is a mjor cause of heart failure, vascular disease, renal failure, and stroke A) chronic hypotension B) chronic hypertension C) orthostatic hypotension D) prehypertensionB) hypertension
True or false: in atherosclerosis, small plaques are harmless; they are dangerous only when the become large or "complicated"False

Section 2

Question Answer
Which of the following affect blood pressure? A) cardiac output B) peripheral resistance C) blood volume D) all of these D) all of these
During stress, the cardioacceleratory center________ heart rate and stroke volume via_______ stimulation increases; sypathetic
True or false: Short-term regulation of blood pressure is achieved primarily by alterations in cardiac output and peripheral resistance. True
Baroreceptors detect changes in ______. A) blood 02 levels B) stretch in arterial walls C) blood CO2 levels D) blood H+ levels E) all B) stretch in arterial walls
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)
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 D) all
In response to increased blood volume, which of the following hormones would you expect to be released? A) Atrial natriurectic peptide (ANP) B) aldosterone C) epinephrine D) angiotensin 11 A) atrial natriuretic peptide
The renin-angiotensin mechanism stimulates the release of which hormone from the adrenal cortex? A) ADH B) Aldosterone C) Norepinephrine D) ANPB) Aldosterone

Section 3

Question Answer
Which of the following forces fluids out of the blood into the tissues? A) Colloid osmotic pressure B) Capillary hydrostatic presuure C) Interstitial fluid hydrostatic pressure D) Interstitial fluid osmotic pressure B) Capillary hydrostatic pressure
Which of the following does not cause vasodilation? A) Nitric oxide NO B) high levels of CO2 C) low levels of O2 D) Endothelins E) Inflammatory chemicals D) Endothelins (cause vasoconstriction)
True or false: A myogenic response is best described the reflexive contraction of smooth muscle upon detection of high O2 levels false
Vascular smooth muscle responds directly to passive stretch with: A) vasodilation B) Increased tone C) Decreased tone D) Active stretch B) Increased tone
Blood flow is SLOWEST traveling through which of the following blood vessels? Capillaries
A decrease in O2 level in skeletal muscle would initiate an autoregulatory mechanism that would stimulate _______ in the arterioles supplying the muscle. A) It increases delivery of nutrients to the skin to induce sweating B) Because skeletal muscles are close to the skin, they receive oxygen via diffusion. C) Heat is dissipated across the skin from the blood to help cool the body. D) Exercise produces metabolites that induce vasodilationC) Heat is dissipated across the skin from the blood to help cool the body.
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 bes and into circulation at the venous ends.True
Viens run ______. A) superficial only B) both deep and superficial C) In an orderly, easy-to-follow pathway D) More than one of the aboveB) both deep and superficial

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