Question 1

Using the appropriate equations, predict the effects in each scenario.
A.Vessels X and Y have the same diameter.X is 5 cm long and Y is 10 cm long.Which has the faster velocity of flow for the same fluid?
B.A blood vessel has a radius of 4 cm.Vasoconstriction reduces the radius to 1 cm.In order to maintain the same flow, by what factor must pressure increase?
C.The blood vessel in B above dilates from 1 cm to 4 cm.Does the flow rate increase or decrease?
D.A new subdivision is built between your house and the water storage tower.If the water company makes no adjustments, will the water pressure at your house change? If so, in which direction? Why?

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Question 2

How many liters of blood are distributed between the pulmonary and systemic circuits in a "typical" person? Assume 20% of the blood is in the lungs at any moment.If the cardiac output is 5 L/min, how long will it take a drop of blood to flow from the right ventricle to the left ventricle?

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Question 3

If the stroke volume of the left ventricle is 65 mL/beat and the stroke volume of the right ventricle is 68 mL/beat, what will happen to the relative distribution of blood in the systemic and pulmonary circulation after 15 beats?

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Question 4

A person has a total blood volume of 5 L.Of this total, 4 liters is contained in the systemic circulation and 1 L in the pulmonary circulation.If the person has a cardiac output of 5 L/min:
A.how long will it take for a drop of blood leaving the left ventricle to return to the heart?
B.how long will it take a drop of blood to go from the right ventricle to the left ventricle?

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The answer of A person has a total blood volume...

Question 5

Compare the flow rates (Q)of tubes one and two, assuming the following parameters:
 $$\text { Tube one: } \Delta \mathrm { P } = 30 , \mathrm { r } = 3 , \mathrm {~L} = 20 \text {. Tube two: } \Delta \mathrm { P } = 60 , \mathrm { r } = 4 , \mathrm {~L} = 10$$

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Question 6

You are constructing working models of the heart for extra credit.Your first attempt failed because the cells separated from each other during beating.What structures did you omit, and why did this allow the heart to fall apart? You omitted the gap junctions in your second attempt.How would a real heart fail to function normally without gap junctions?

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Question 7

What is a normal heart rate for healthy adults at rest, and what neural inputs contribute to the achievement of that range? How is heart rate affected when all nervous system input to the heart is blocked, and why is this effect seen?

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Question 8

Vern, suffering from cardiac arrhythmias, is brought into the emergency room of a hospital.He begins to exhibit tachycardia and as a result loses consciousness.His anxious wife asks you why he has lost consciousness.What would you tell her?

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Question 9

Atropine inhibits parasympathetic activity.Discuss the effects of atropine on the heart and describe common expected side effects.

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Question 10

Miguel is a 25-year-old jogger with a target heart rate of 125 bpm.His resting pulse is 70 bpm.His blood volume is approximately 6.8 liters.At rest, his cardiac output is 6.3 liters/min.
A.What must his stroke volume be?
B.What might his EDV and ESV be?
C.During his workout, his heart rate increases to 125 bpm and his cardiac output to 12,500 mL/min.Do his SV, EDV, and ESV change with exercise?

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Question 11

Using the figure below (Fig.14.18 from your text), calculate the following values:
  
A.Heart rate
B.Stroke volume
C.Cardiac output
D.Mean Arterial Pressure

Accepted Answer

The answer of Using the figure below (Fig.14.18 from your...

Quiz 14: Cardiovascular Physiology

How many liters of blood are distributed between the pulmonary and systemic circuits in a "typical" person? Assume 20% of the blood is in the lungs at any moment.If the cardiac output is 5 L/min, how long will it take a drop of blood to flow from the right ventricle to the left ventricle?

If the stroke volume of the left ventricle is 65 mL/beat and the stroke volume of the right ventricle is 68 mL/beat, what will happen to the relative distribution of blood in the systemic and pulmonary circulation after 15 beats?

Compare the flow rates (Q)of tubes one and two, assuming the following parameters: $\text { Tube one: } \Delta \mathrm { P } = 30 , \mathrm { r } = 3 , \mathrm {~L} = 20 \text {. Tube two: } \Delta \mathrm { P } = 60 , \mathrm { r } = 4 , \mathrm {~L} = 10$

What is a normal heart rate for healthy adults at rest, and what neural inputs contribute to the achievement of that range? How is heart rate affected when all nervous system input to the heart is blocked, and why is this effect seen?

Vern, suffering from cardiac arrhythmias, is brought into the emergency room of a hospital.He begins to exhibit tachycardia and as a result loses consciousness.His anxious wife asks you why he has lost consciousness.What would you tell her?

Atropine inhibits parasympathetic activity.Discuss the effects of atropine on the heart and describe common expected side effects.

Using the figure below (Fig.14.18 from your text), calculate the following values: A.Heart rate B.Stroke volume C.Cardiac output D.Mean Arterial Pressure