Question 1

Which valves have chordae tendineae?

Accepted Answer

A)   aortic and pulmonary valves
B)   bicuspid (mitral)  and tricuspid valves
C)   valves in veins
D)   semilunar valves
E)   coronary valves

Question 2

The cardiac output is equal to

Accepted Answer

A)   the difference between the end-diastolic volume and the end-systolic volume.
B)   the product of heart rate and stroke volume.
C)   the difference between the stroke volume at rest and the stroke volume during exercise.
D)   the stroke volume less the end-systolic volume.
E)   the product of heart rate and blood pressure.

Question 3

Which of the following conditions would have the greatest effect on peripheral resistance?

Accepted Answer

A)   doubling the length of a vessel
B)   doubling the diameter of a vessel
C)   doubling the viscosity of the blood
D)   doubling the turbulence of the blood
E)   doubling the number of white cells in the blood

Question 4

Manganese ions block the calcium channels in the cardiac muscle membrane.How would the presence of manganese in the extracellular fluid affect the contraction of the heart muscle?

Accepted Answer

A)   The plateau phase of contraction would be longer.
B)   The refractory period would be shorter.
C)   The heart would beat less forcefully.
D)   The heart rate would increase.
E)   The contraction phase would be prolonged.

Question 5

Put these autorhythmic cells into the correct order for conveying electrical signals through a normal heart.
1) bundle of His
2) internodal pathway
3) Purkinje fibers
4) atrioventricular node
5) sinoatrial nodes
6) left and right bundle branches

Accepted Answer

A)   5, 2, 1, 6, 4, 3
B)   5, 2, 4, 1, 6, 3
C)   4, 2, 5, 1, 6, 3
D)   3, 6, 1, 4, 2, 5
E)   5, 4, 1, 6, 2, 3

Question 6

Sonja is pregnant.Over the next 40 weeks, her uterus will enlarge as the placenta develops and the fetus grows, her abdomen will add skin to accommodate distension, her breasts will grow, her blood volume will increase, and many other changes will occur.Using what you have learned about basic cardiovascular physiology, predict how parameters such as blood pressure and cardiac output will change.(Note that the fetus has a separate cardiovascular system, which does not need to be considered.)Explain your answer.

Accepted Answer

(Note to the instructor: These predictio...

Question 7

A resting heart rate of less than 60 beats per minute is identified as ________.

Accepted Answer

The answer of A resting heart rate of less than...

Question 8

Match the following terms to the correct answer:
-has three cuplike leaflets and has the aorta on one side

Accepted Answer

A)  tricuspid valve
B)  bicuspid valve
C)  aortic valve
D)  pulmonary valve

Question 9

The action potential in a cardiac contractile cell causes

Accepted Answer

A)   opening of L-type calcium channels.
B)   opening of ryanodine receptor calcium channels.
C)   activation of sodium-potassium ATPase.
D)   activation of NCX transporters.
E)   opening of HCN channels.

Question 10

What are ryanodine receptors? What type of tissue are they present in? Are all ryanodine receptors regulated in the same way? Explain your answer.

Accepted Answer

Ryanodine receptors are calcium channels...

Question 11

Atrial contraction

Accepted Answer

A)   begins during the first part of the P wave.
B)   begins just after the T wave.
C)   begins just after the Q wave.
D)   begins during the latter part of the P wave.
E)   None of the answers are correct.

Question 12

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?

Accepted Answer

During tachycardia, the heart beats at a...

Question 13

The superior portion of the heart where the major blood vessels enter and exit is the ________.

Accepted Answer

The answer of The superior portion of the heart where...

Question 14

The driving force for blood flow is a(n) ________ gradient.

Accepted Answer

A)   osmotic
B)   volume
C)   pressure
D)   gravity

Question 15

The ________ is the amount of blood in a ventricle at the beginning of systole.

Accepted Answer

end-diasto...

Question 16

A typical action potential of a myocardial contractile cell lasts ________ millisecond(s) .

Accepted Answer

A)   less than 1
B)   1-5
C)   50-100
D)   at least 200
E)   at least 500

Question 17

Which parameters are associated with increased resistance?

Accepted Answer

A)   reduced flow
B)   reduced friction
C)   increased blood vessel diameter
D)   decreased viscosity
E)   decreased length

Question 18

Autorhythmic cells

Accepted Answer

A)   are also called pacemakers because they set the rate of the heartbeat.
B)   are the same size as myocardial contractile cells.
C)   have organized sarcomeres.
D)   contribute to the force of contraction.
E)   None of the answers are correct.

Question 19

Match the name of the wave with the correlated event.
-immediately followed by ventricular contraction

Accepted Answer

A)  P wave
B)  QRS complex
C)  T wave
D)  PR segment
E)  ST segment

Question 20

The term for reduced blood flow to the cardiac muscle is ________.

Accepted Answer

The answer of The term for reduced blood flow to...

Exam 14: Cardiovascular Physiology

The ________ is the amount of blood in a ventricle at the beginning of systole.

Correct Answer
verified
end-diasto...
View Answer

Manganese ions block the calcium channels in the cardiac muscle membrane.How would the presence of manganese in the extracellular fluid affect the contraction of the heart muscle?

Correct Answer
verified

Autorhythmic cells

Correct Answer
verified

Which valves have chordae tendineae?

Correct Answer
verified

A typical action potential of a myocardial contractile cell lasts ________ millisecond(s) .

Correct Answer
verified

The superior portion of the heart where the major blood vessels enter and exit is the ________.

Correct Answer
verified

The cardiac output is equal to

Correct Answer
verified

The term for reduced blood flow to the cardiac muscle is ________.

Correct Answer
verified

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?

Correct Answer
verified
During tachycardia, the heart beats at a...
View Answer

A resting heart rate of less than 60 beats per minute is identified as ________.

Correct Answer
verified

Which of the following conditions would have the greatest effect on peripheral resistance?

Correct Answer
verified

The action potential in a cardiac contractile cell causes

Correct Answer
verified

Put these autorhythmic cells into the correct order for conveying electrical signals through a normal heart. 1) bundle of His 2) internodal pathway 3) Purkinje fibers 4) atrioventricular node 5) sinoatrial nodes 6) left and right bundle branches

Correct Answer
verified

Match the name of the wave with the correlated event. -immediately followed by ventricular contraction

Correct Answer
verified

Which parameters are associated with increased resistance?

Correct Answer
verified

Atrial contraction

Correct Answer
verified

Correct Answer
verified
(Note to the instructor: These predictio...
View Answer

Match the following terms to the correct answer: -has three cuplike leaflets and has the aorta on one side

Correct Answer
verified

The driving force for blood flow is a(n) ________ gradient.

Correct Answer
verified

What are ryanodine receptors? What type of tissue are they present in? Are all ryanodine receptors regulated in the same way? Explain your answer.

Correct Answer
verified
Ryanodine receptors are calcium channels...
View Answer

Exam 14: Cardiovascular Physiology

The ________ is the amount of blood in a ventricle at the beginning of systole.

Correct Answerverifiedend-diasto...View AnswerShow Answer

Manganese ions block the calcium channels in the cardiac muscle membrane.How would the presence of manganese in the extracellular fluid affect the contraction of the heart muscle?

Correct AnswerverifiedShow Answer

Autorhythmic cells

Correct AnswerverifiedShow Answer

Which valves have chordae tendineae?

Correct AnswerverifiedShow Answer

A typical action potential of a myocardial contractile cell lasts ________ millisecond(s) .

Correct AnswerverifiedShow Answer

The superior portion of the heart where the major blood vessels enter and exit is the ________.

Correct AnswerverifiedShow Answer

The cardiac output is equal to

Correct AnswerverifiedShow Answer

The term for reduced blood flow to the cardiac muscle is ________.

Correct AnswerverifiedShow Answer

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?

Correct AnswerverifiedDuring tachycardia, the heart beats at a...View AnswerShow Answer

A resting heart rate of less than 60 beats per minute is identified as ________.

Correct AnswerverifiedShow Answer

Which of the following conditions would have the greatest effect on peripheral resistance?

Correct AnswerverifiedShow Answer

The action potential in a cardiac contractile cell causes

Correct AnswerverifiedShow Answer

Put these autorhythmic cells into the correct order for conveying electrical signals through a normal heart. 1) bundle of His 2) internodal pathway 3) Purkinje fibers 4) atrioventricular node 5) sinoatrial nodes 6) left and right bundle branches

Correct AnswerverifiedShow Answer

Match the name of the wave with the correlated event. -immediately followed by ventricular contraction

Correct AnswerverifiedShow Answer

Which parameters are associated with increased resistance?

Correct AnswerverifiedShow Answer

Atrial contraction

Correct AnswerverifiedShow Answer

Correct Answerverified(Note to the instructor: These predictio...View AnswerShow Answer

Match the following terms to the correct answer: -has three cuplike leaflets and has the aorta on one side

Correct AnswerverifiedShow Answer

The driving force for blood flow is a(n) ________ gradient.

Correct AnswerverifiedShow Answer

What are ryanodine receptors? What type of tissue are they present in? Are all ryanodine receptors regulated in the same way? Explain your answer.

Correct AnswerverifiedRyanodine receptors are calcium channels...View AnswerShow Answer

Correct Answer
verified
end-diasto...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
During tachycardia, the heart beats at a...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
(Note to the instructor: These predictio...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Ryanodine receptors are calcium channels...
View Answer