Question 1

Parasympathetic innervation influences the heart rate,but generally tends to have no direct effect on the force of contractions.

Accepted Answer

A) True 
 B)False

Question 2

Typically,there are __________ papillary muscles that project from the wall of the left ventricle and attach to the tendinous cords that support the left AV valve.

Accepted Answer

A)  three
B)  two
C)  a highly variable number of
D)  six
E)  noF) C) and D)
G) B) and C)

Question 3

Metabolically,cardiac muscle relies on

Accepted Answer

A)  aerobic metabolism using glycolysis of glycogen to meet most ATP demands.
B)  aerobic metabolism using many mitochondria and a rich supply of myoglobin.
C)  anaerobic metabolism using glycolytic enzymes to quickly generate ATP.
D)  anaerobic metabolism using myoglobin,creatin kinase,and ketone bodies.E) A) and C)
F) B) and C)

Question 4

Which action leads to the closure of the right atrioventricular valve

Accepted Answer

A)  Contraction of the right atrium
B)  Contraction of the left atrium
C)  Contraction of the right ventricle
D)  Relaxation of the right ventricle
E)  Relaxation of the left atriumF) None of the above
G) C) and D)

Question 5

Cardiac output is the amount of blood that is pumped

Accepted Answer

A)  by a single ventricle in one hour.
B)  by a single ventricle in one minute.
C)  by both ventricles in one hour.
D)  by both ventricles in one minute.
E)  by the left ventricle into the aorta in one beat.F) C) and D)
G) None of the above

Question 6

Which correctly describes the heart's apex

Accepted Answer

A)  Projects slightly anteroinferiorly toward the left side of the body
B)  Projects slightly anteroinferiorly toward the right side of the body
C)  Projects slightly posteroinferiorly toward the left side of the body
D)  Projects slightly posteroinferiorly toward the right side of the body
E)  Projects slightly posteroinferiorly toward the midline of the bodyF) A) and E)
G) D) and E)

Question 7

Though the autonomic innervation by autonomic centers in the brainstem cannot initiate a heartbeat,it can increase or decrease the heart rate.

Accepted Answer

A) True 
 B)False

Question 8

Atrial contraction occurs just before

Accepted Answer

A)  isovolumetric relaxation.
B)  atrial relaxation and ventricular filling.
C)  ventricular ejection.
D)  isovolumetric contraction.E) B) and D)
F) All of the above

Question 9

What is the sequence of events in the transmission of an impulse through the heart muscle
A: AV node
B: AV bundle
C: SA node
D: Through the atria
E: Through the ventricles
F: Bundle branches
G: Purkinje fibers

Accepted Answer

A)  c,d,a,b,f,g,e
B)  d,b,a,c,f,g,e
C)  b,a,d,c,f,g,e
D)  f,g,d,c,b,a,e
E)  c,d,a,f,b,g,eF) A) and E)
G) A) and C)

Question 10

What would you expect a cardiologist to recommend if there was substantial occlusion to a patient's left coronary artery but not the right coronary artery

Accepted Answer

A)  Because there are multiple alternate paths for blood delivery,the cardiologist would not intervene.
B)  Because this is a relatively small,unimportant artery,the cardiologist would not intervene.
C)  Because this is an important artery,and alternate vascular paths are inadequate,the cardiologist would treat the condition.
D)  Because occlusions require blood to be moved under greater pressure,the cardiologist would prescribe drugs to raise blood pressure.E) B) and D)
F) C) and D)

Question 11

Immediately prior to atrial contraction,blood continues to enter the atria from the venae cavae and pulmonary veins.

Accepted Answer

A) True 
 B)False

Question 12

Just prior to atrial contraction,

Accepted Answer

A)  all four chambers are at rest and AV valves are open.
B)  all four chambers are at rest and AV valves are closed.
C)  all four chambers are contracting and all valves are open.
D)  both ventricles are contracting and blood is being ejected into the major arteries.
E)  both atria are contracting and blood is being ejected into the major arteries.F) A) and C)
G) A) and E)

Question 13

Sympathetic innervation of the heart arises from the ________ segments of the spinal cord.

Accepted Answer

A)  T1-T5
B)  T3-T8
C)  T5-T10
D)  T6-T11
E)  T11-L2F) B) and E)
G) D) and E)

Question 14

The heart valves

Accepted Answer

A)  stabilize and hold the arteries leaving the heart.
B)  permit the passage of blood in one direction.
C)  separate the right and left sides of the heart.
D)  are only used in the fetal heart.
E)  direct the conduction impulse through the heart muscle.F) B) and C)
G) None of the above

Question 15

Explain the factors that affect cardiac output.In your answer provide one example of a positive inotropic agent and one example of a positive chronotropic agent.For each of those examples,explain what specifically happens to the cells of the heart when they have their effect.

Accepted Answer

CO = SV * HR,so a positive ino...

Question 16

The receiving chambers of the heart are the atria,and the forcefully pumping chambers of the heart are the ventricles.

Accepted Answer

A) True 
 B)False

Question 17

Each of the receiving chambers of the heart has a wrinkled flaplike extension;the one that is more visible from an anterior view is the

Accepted Answer

A)  interatrial septum.
B)  interventricular septum.
C)  left auricle.
D)  right auricle.E) C) and D)
F) B) and C)

Question 18

Which feature permits the compression necessary to pump large volumes of blood out of the ventricles

Accepted Answer

A)  Negative pressure inside the ventricles
B)  Absence of oxygenated blood in the atria
C)  Arrangement of cardiac muscle in the heart wall
D)  Presence of skeletal muscle tissue in the heart skeleton
E)  Presence of papillary muscles in the ventriclesF) C) and E)
G) A) and E)

Question 19

Nodal cells contain fast voltage-gated calcium channels.

Accepted Answer

A) True 
 B)False

Question 20

Which vein drains the posterior aspect of the ventricles of the heart

Accepted Answer

A)  Great cardiac vein
B)  Middle cardiac vein
C)  Small cardiac vein
D)  Circumflex veinE) B) and C)
F) None of the above

Exam 19: Cardiovascular System: Heart

Which vein drains the posterior aspect of the ventricles of the heart

Correct AnswerverifiedShow Answer

The heart valves

Correct AnswerverifiedShow Answer

Which feature permits the compression necessary to pump large volumes of blood out of the ventricles

Correct AnswerverifiedShow Answer

Though the autonomic innervation by autonomic centers in the brainstem cannot initiate a heartbeat,it can increase or decrease the heart rate.

Correct AnswerverifiedShow Answer

Which action leads to the closure of the right atrioventricular valve

Correct AnswerverifiedShow Answer

What would you expect a cardiologist to recommend if there was substantial occlusion to a patient's left coronary artery but not the right coronary artery

Correct AnswerverifiedShow Answer

Typically,there are __________ papillary muscles that project from the wall of the left ventricle and attach to the tendinous cords that support the left AV valve.

Correct AnswerverifiedShow Answer

Each of the receiving chambers of the heart has a wrinkled flaplike extension;the one that is more visible from an anterior view is the

Correct AnswerverifiedShow Answer

Just prior to atrial contraction,

Correct AnswerverifiedShow Answer

Immediately prior to atrial contraction,blood continues to enter the atria from the venae cavae and pulmonary veins.

Correct AnswerverifiedShow Answer

Nodal cells contain fast voltage-gated calcium channels.

Correct AnswerverifiedShow Answer

Parasympathetic innervation influences the heart rate,but generally tends to have no direct effect on the force of contractions.

Correct AnswerverifiedShow Answer

Which correctly describes the heart's apex

Correct AnswerverifiedShow Answer

Cardiac output is the amount of blood that is pumped

Correct AnswerverifiedShow Answer

The receiving chambers of the heart are the atria,and the forcefully pumping chambers of the heart are the ventricles.

Correct AnswerverifiedShow Answer

Atrial contraction occurs just before

Correct AnswerverifiedShow Answer

Metabolically,cardiac muscle relies on

Correct AnswerverifiedShow Answer

What is the sequence of events in the transmission of an impulse through the heart muscle A: AV node B: AV bundle C: SA node D: Through the atria E: Through the ventricles F: Bundle branches G: Purkinje fibers

Correct AnswerverifiedShow Answer

Sympathetic innervation of the heart arises from the ________ segments of the spinal cord.

Correct AnswerverifiedShow Answer

Explain the factors that affect cardiac output.In your answer provide one example of a positive inotropic agent and one example of a positive chronotropic agent.For each of those examples,explain what specifically happens to the cells of the heart when they have their effect.

Correct AnswerverifiedCO = SV * HR,so a positive ino...View AnswerShow Answer

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CO = SV * HR,so a positive ino...
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