Question 1

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

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

Question 4

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 5

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

Question 6

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 7

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. 
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 8

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 
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 9

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 
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 10

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

Question 11

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. 
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 12

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 13

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. 
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 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

end-diasto

Question 16

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

Question 17

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 18

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 19

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. 
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 20

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

Accepted Answer

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

Exam 14: Cardiovascular Physiology

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

The cardiac output is equal to

Which parameters are associated with increased resistance?

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?

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

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

The action potential in a cardiac contractile cell causes

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

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

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

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?

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

Atrial contraction

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

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

Which valves have chordae tendineae?

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

Autorhythmic cells

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

Introduction to Physiology

Molecular Interactions

Compartmentation: Cells and Tissues

Energy and Cellular Metabolism

Membrane Dynamics

Communication, Integration, and Homeostasis

Introduction to the Endocrine System

Neurons: Cellular and Network Properties

The Central Nervous System

Sensory Physiology

Efferent Division: Autonomic and Somatic Motor Control

Muscles

Integrative Physiology I: Control of Body Movement

Blood Flow and the Control of Blood Pressure

Blood

Mechanics of Breathing

Gas Exchange and Transport

The Kidneys

Integrative Physiology II: Fluid and Electrolyte Balance

The Digestive System

Metabolism and Energy Balance

Endocrine Control of Growth and Metabolism

The Immune System

Integrative Physiology III: Exercise

Reproduction and Development

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