Test 3_2011 - Test 3 You scored 98 out of 100 Question 1...

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Test 3 You scored 98 out of 100 Question 1 Your answer is CORRECT. Resistance: a) is a measure of the hindrance to blood flow through a vessel caused by friction between the moving fluid and stationary vascular walls. b) is doubled when the radius of the vessel is reduced by one-half. c) increases sixteen-fold when the radius of the vessel is reduced by one-half. d) both (a) and (b) above. e) both (a) and (c) above. Question 2 Your answer is CORRECT. Which of the following ECG waves represents ventricular depolarization? a) P wave b) QRS complex c) T wave d) PR segment e) ventricular depolarization occurs simultaneously with atrial repolarization and can not be recorded. Question 3 Your answer is CORRECT. The term that describes the volume of blood circulated by the heart in one minute is a) cardiac output (CO). b) heart rate (HR). c) end diastolic volume (EDV). d) stroke volume (SV). e) end systolic volume (ESV). Question 4 Your answer is CORRECT. Which of the following factors produce an inward pressure (e.g. from the interstitial space into the capillaries) on the blood vessels? a) Capillary blood pressure b) Interstitial fluid-colloid osmotic pressure c) Plasma colloid osmotic pressure d) Both (a) and (c) Question 5 Your answer is CORRECT. Which is not found within erythrocytes? a) Carbonic anhydrase. b) Glycolytic enzymes. c) Hemoglobin.
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d) Mitochondria. e) Bicarbonate ions. Question 6 Your answer is CORRECT. When blood flow to an area of the lungs is reduced but the area receives normal air flow all of the following occur except: a) The concentration of CO 2 in this area will be decreased. b) The change in CO 2 concentration will cause the smooth muscles of the local airways to relax. c) The change in CO 2 concentration will lead to increased resistance of local airways. d) The change in O 2 concentration will lead to dilation of local blood vessels. e) The change in O 2 concentration will lead to decreased vascular resistance. Question 7 Your answer is CORRECT. The most important factor controlling respiration is the partial pressure of carbon dioxide of the arterial blood detected indirectly by the central chemoreceptors in the CNS. a) True b) False Question 8 Your answer is CORRECT. Which of the following factors would produce the greatest change in blood flow? a) doubling the radius of the vessel. b) doubling the difference in the pressure gradient within the vessel. c) doubling the viscosity of the blood. d) doubling the length of the vessel. e) halving the viscosity of the blood. Question 9 Your answer is CORRECT. The direction of the impulse through the conduction system of the heart for each cardiac cycle is normally: a) AV node SA node bundle of His Purkinje fibers b) AV node bundle of His SA node Purkinje fibers c) bundle of His AV node Purkinje fibers SA node d) SA node AV node bundle of His Purkinje fibers e) SA node bundle of His Purkinje fibers AV node Question 10 Your answer is CORRECT. The venous valves:
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This note was uploaded on 01/05/2012 for the course CHEM 3321 taught by Professor Bean during the Spring '11 term at American Jewish University.

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Test 3_2011 - Test 3 You scored 98 out of 100 Question 1...

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