Cardiac Dynamics Ex 5 Act. 1, 2, 3, 4, 5, 6 and 7 PDF

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PhysioEx Exercises....

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3/2/2021

Cardiac Dynamics Ex 5: Act. 1, 2, 3, 4, 5, 6 and 7

Cardiac Dynamics Ex 5: Act. 1, 2, 3, 4, 5, 6 and 7 Due: 11:59pm on Tuesday, February 23, 2021 You will receive no credit for items you complete after the assignment is due. Grading Policy

PhysioEx Exercise 5 > Activity 1: Overview and Pre-lab Quiz for Studying the Effect of Blood Vessel Radius on Blood Flow Rate Read the introduction and then answer the Pre-lab Quiz questions to the right. Exercise 5 > Activity 1: Studying the Effect of Blood Vessel Radius on Blood Flow Rate

Part A The free-flowing blood located in the middle of a blood vessel is called _______. ANSWER:

laminar flow gradient flow lumen flow friction flow

Correct

Part B The flow rate of a liquid is _______. ANSWER:

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directly proportional to the pressure gradient directly proportional to the pressure gradient and the resistance directly proportional to the resistance inversely proportional to the pressure gradient

Correct

Part C Which of the following is INCORRECTLY matched with the corresponding equipment used in this experiment? ANSWER:

left beaker - blood flowing from the heart flow tube between the beakers - an artery All of the above are matched correctly.

Correct

Part D Which of the following has the greatest effect on peripheral resistance? ANSWER:

viscosity viscosity, blood vessel length and blood vessel diameter affect peripheral resistance equally blood vessel length blood vessel diameter

Correct

PhysioEx Exercise 5 > Activity 1: Activity and Post-lab Quiz for Studying the Effect of Blood Vessel Radius on Blood Flow Rate Click on the link or the image below to launch Exercise 5 > Activity 1: Studying the Effect of Blood Vessel Radius on Blood Flow Rate. Complete the Experiment and then answer the Post-lab Quiz questions to the right. Exercise 5 > Activity 1: Studying the Effect of Blood Vessel Radius on Blood Flow Rate

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Cardiac Dynamics Ex 5: Act. 1, 2, 3, 4, 5, 6 and 7

Part A How does the body decrease the blood vessel radius? ANSWER:

vasodilation vasoconstriction cardiac muscle contraction valve closure

Correct

Part B When the radius of the flow tube is decreased, the _______. ANSWER:

fluid flow rate decreases fluid flow rate and the pressure gradient decrease fluid flow rate increases pressure gradient decreases friction decreases

Correct

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Part C During exercise, we might expect blood vessels in the skeletal muscle to be somewhat _______________ and the blood vessels in the digestive organs to be somewhat ____________. ANSWER:

dilated, constricted dilated, dilated constricted, constricted constricted, dilated

Correct

Part D Laminar flow of the blood is achieved through _______. ANSWER:

vasoconstriction and smooth muscle contraction smooth muscle contraction vasoconstriction vasodilation

Correct

PhysioEx Exercise 5 > Activity 2: Overview and Pre-lab Quiz for Studying the Effect of Blood Viscosity on Blood Flow Rate Read the introduction and then answer the Pre-lab Quiz questions to the right. Exercise 5 > Activity 2: Studying the Effect of Blood Viscosity on Blood Flow Rate

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Part A Polycythemia results in _______. ANSWER:

increased resistance to flow decreased resistance to flow decreased resistance to flow and decreased viscosity increased resistance to flow and decreased viscosity decreased viscosity

Correct

Part B What is the effect of increased viscosity? ANSWER:

decreased peripheral resistance decreased flow rate increased flow rate decreased flow rate and decreased peripheral resistance

Correct

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Part C Formed elements in the blood _______. ANSWER:

include platelets and whole cells that slide past one another slide past one another include whole cells include platelets

Correct

Part D Which of the following is INCORRECTLY matched? ANSWER:

thrombocytes - plasma proteins leukocytes - white blood cells erythrocytes - red blood cells All of the above are matched correctly.

Correct

PhysioEx Exercise 5 > Activity 2: Activity and Post-lab Quiz for Studying the Effect of Blood Viscosity on Blood Flow Rate Click on the link or the image below to launch Exercise 5 > Activity 2: Studying the Effect of Blood Viscosity on Blood Flow Rate Complete the Experiment and then answer the Post-lab Quiz questions to the right. Exercise 5 > Activity 2: Studying the Effect of Blood Viscosity on Blood Flow Rate

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Part A In this activity, which of the following were kept constant? ANSWER:

blood vessel radius and blood vessel length blood vessel radius and blood flow rate blood vessel radius and viscosity blood pressure and blood flow rate

Correct

Part B Which of the following describes the graph of flow versus viscosity? ANSWER:

As viscosity increased, the flow rate increased and the graph was linear. As viscosity increased, the flow rate increased and the graph was curved. As viscosity increased, the flow rate decreased and the graph was curved. As viscosity increased, the flow rate decreased and the graph was linear.

Correct

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Part C Which viscosity had the fastest flow rate? ANSWER:

2 4 6 1 8

Correct

Part D What is the typical range for viscosity of the blood? ANSWER:

6 to 8 3 to 5 1 to 3 4 to 6

Correct

PhysioEx Exercise 5 > Activity 3: Overview and Pre-lab Quiz for Studying the Effect of Blood Vessel Length on Blood Flow Rate Read the introduction and then answer the Pre-lab Quiz questions to the right. Exercise 5 > Activity 3: Studying the Effect of Blood Vessel Length on Blood Flow Rate

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Part A When blood vessel length increases, _______. ANSWER: surface area increases and resistance to flow decreases friction decreases surface area increases resistance to flow decreases

Correct

Part B Which of the following is true of blood vessel length? ANSWER:

It increases as we approach puberty. It decreases when we gain weight. It increases when we lose weight. All of the above are true.

Correct

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Cardiac Dynamics Ex 5: Act. 1, 2, 3, 4, 5, 6 and 7

Part C In this experiment, _______. ANSWER:

blood vessel radius will be kept constant and blood vessel length will be varied blood vessel length will be kept constant blood vessel radius will be kept constant blood vessel length will be varied blood vessel radius will be varied

Correct

PhysioEx Exercise 5 > Activity 3: Activity and Post-lab Quiz for Studying the Effect of Blood Vessel Length on Blood Flow Rate Click on the link or the image below to launch Exercise 5 > Activity 3: Studying the Effect of Blood Vessel Length on Blood Flow Rate. Complete the Experiment and then answer the Post-lab Quiz questions to the right. Exercise 5 > Activity 3: Studying the Effect of Blood Vessel Length on Blood Flow Rate

Part A Increasing blood vessel length _______. ANSWER:

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has the same effect as increasing blood vessel radius and increases resistance to flow has the same effect as decreasing blood vessel radius and increases resistance to flow increases resistance to flow has the same effect as decreasing blood vessel radius has the same effect as increasing blood vessel radius

Correct

Part B Which flow tube length had the greatest flow rate? ANSWER:

30 mm 40 mm 10 mm 20 mm All flow tube lengths had the same flow rate.

Correct

Part C Which of the following has the greatest effect on blood flow? ANSWER: blood vessel radius Blood vessel radius, viscosity and blood vessel length all have an equal effect. viscosity blood vessel length

Correct

Part D Which of the following describes why the body might need to increase vessel length? https://session.masteringaandp.com/myct/assignmentPrintView?assignmentID=7822677

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ANSWER: to accommodate weight loss to accommodate weight gain and height changes to accommodate height changes to accommodate weight gain

Correct

PhysioEx Exercise 5 > Activity 4: Overview and Pre-lab Quiz for Studying the Effect of Blood Pressure on Blood Flow Rate Read the introduction and then answer the Pre-lab Quiz questions to the right. Exercise 5 > Activity 4: Studying the Effect of Blood Pressure on Blood Flow Rate

Part A In this activity, which variable will be changed? ANSWER:

vessel radius and pressure vessel radius vessel length pressure

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Correct

Part B Arteries that are closer to the heart _______. ANSWER:

have less elastic tissue must be able to withstand pressure changes have more elastic tissue have more elastic tissue and must be able to withstand pressure changes have less elastic tissue and must be able to withstand pressure changes

Correct

Part C In the cardiovascular system, the pressure gradient is provided by _______. ANSWER:

osmosis the force of contraction of the heart the force of contraction of the heart and peripheral resistance in the blood vessels peripheral resistance in the blood vessels

Correct

Part D Blood flow is _______. ANSWER:

inversely proportional to the pressure gradient not proportional to the pressure gradient inversely proportional to cardiac output directly proportional to the pressure gradient

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Correct

PhysioEx Exercise 5 > Activity 4: Activity and Post-lab Quiz for Studying the Effect of Blood Pressure on Blood Flow Rate Click on the link or the image below to launch Exercise 5 > Activity 4: Studying the Effect of Blood Pressure on Blood Flow Rate Complete the Experiment and then answer the Post-lab Quiz questions to the right. Exercise 5 > Activity 4: Studying the Effect of Blood Pressure on Blood Flow Rate

Part A Which of the following result(s) in an increase in fluid flow rate? ANSWER:

increase in radius diameter increase in pressure increase in pressure and increase in radius diameter increase in pressure and decrease in radius diameter decrease in radius diameter

Correct

Part B Describe the plot of pressure versus flow rate. ANSWER: https://session.masteringaandp.com/myct/assignmentPrintView?assignmentID=7822677

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It was linear, and the flow rate decreased with increased pressure. It was curved, and the flow rate increased with increased pressure. It was linear, and the flow rate increased with increased pressure. It was curved, and the flow rate decreased with increased pressure.

Correct

Part C In this activity, we changed the pressure delivered by the left beaker. This is analogous to _______. ANSWER:

increasing the length of the flow tube increasing the viscosity of the blood decreasing the radius of the blood vessel increasing the force of contraction of the heart

Correct

PhysioEx Exercise 5 > Activity 5: Activity and Post-lab Quiz for Studying the Effect of Blood Vessel Radius on Pump Activity Click on the link or the image below to launch Exercise 5 > Activity 5: Studying the Effect of Blood Vessel Radius on Pump Activity. Complete the Experiment and then answer the Post-lab Quiz questions to the right. Exercise 5 > Activity 5: Studying the Effect of Blood Vessel Radius on Pump Activity

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Part A The volume in the pump when the pump piston is all the way down represents the _______. ANSWER:

stroke volume end diastolic volume end systolic volume cardiac output

Correct

Part B When the flow tube radius increased, _______. ANSWER:

resistance decreased and pump rate decreased to maintain pressure pump rate increased to maintain pressure pump rate decreased to maintain pressure resistance decreased and pump rate increased to maintain pressure resistance decreased

Correct

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Part C Which of the following stayed constant throughout this activity? ANSWER:

pump rate flow rate stroke volume right flow tube radius

Correct

Part D Which right flow tube radius resulted in the fastest flow rate? ANSWER:

1.0 mm All sizes had the same flow rate. 5.0 mm 3.0 mm

Correct

PhysioEx Exercise 5 > Activity 5: Overview and Pre-lab Quiz for Studying the Effect of Blood Vessel Radius on Pump Activity Read the introduction and then answer the Pre-lab Quiz questions to the right. Exercise 5 > Activity 5: Studying the Effect of Blood Vessel Radius on Pump Activity

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Cardiac Dynamics Ex 5: Act. 1, 2, 3, 4, 5, 6 and 7

Part A During the ejection period, _______. ANSWER:

blood is pumped into the aorta and the pulmonary trunk blood is pumped into the aorta the ventricles are filling the atria are filling blood is pumped into the pulmonary trunk

Correct

Part B Cardiac output is _______. ANSWER:

equal to blood flow and equal to heart rate times stroke volume equal to heart rate times stroke volume equal to blood flow equal to heart rate times (EDV minus ESV) All of the above.

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Correct

Part C The left side of the heart pumps blood _______. ANSWER:

to the lungs through the tricuspid valve and to the lungs through the tricuspid valve through the aortic valve

Correct

Part D What variable(s) can the cardiovascular system alter to maintain blood pressure? ANSWER:

heart rate, stroke volume and resistance stroke volume heart rate resistance

Correct

PhysioEx Exercise 5 > Activity 6: Activity and Post-lab Quiz for Studying the Effect of Stroke Volume on Pump Activity Click on the link or the image below to launch Exercise 5 > Activity 6: Studying the Effect of Stroke Volume on Pump Activity. Complete the Experiment and then answer the Post-lab Quiz questions to the right. Exercise 5 > Activity 6: Studying the Effect of Stroke Volume on Pump Activity

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Cardiac Dynamics Ex 5: Act. 1, 2, 3, 4, 5, 6 and 7

Part A Increase in stroke volume is a result of _______. ANSWER: increased contractility of the heart increased EDV increased contractility of the heart, increased EDV and increased preload increased preload

Correct

Part B Which variable was altered in this activity? ANSWER:

vessel radius stroke volume flow rate blood pressure

Correct

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Part C An increase in venous return _______. ANSWER:

decreases EDV results in decreased preload occurs with severe blood loss occurs during exercise

Correct

Part D The flow rate in this activity _______. ANSWER:

stayed constant, because pump rate decreased as the stroke volume increased stayed constant, because pump rate increased as the stroke volume increased varied with stroke volume stayed constant, because pump rate decreased as the stroke volume decreased

Correct

PhysioEx Exercise 5 > Activity 6: Overview and Pre-lab Quiz for Studying the Effect of Stroke Volume on Pump Activity Read the introduction and then answer the Pre-lab Quiz questions to the right. Exercise 5 > Activity 6: Studying the Effect of Stroke Volume on Pump Activity

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Part A An increase in venous return will _______. ANSWER: increase EDVonly increase stroke volumeonly increase EDV and therefore, increase stroke volume increase the contractility of the heart

Correct

Part B The overlap length of cardiac muscle in the healthy heart is _______. ANSWER:

decreased as the heart is stretched optimum for maximum tension production optimized when the length of the sarcomere is decreased less than optimum for maximum tension production

Correct

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