Question 1

The systemic circuit contains oxygen-rich blood only.

Accepted Answer

A) True 
 B)False

Question 2

The ventricles are almost empty at the end of ventricular diastole.

Accepted Answer

A) True 
 B)False

Question 3

Blood in the heart chambers provides most of the myocardium's oxygen and nutrient needs.

Accepted Answer

A) True 
 B)False

Question 4

Parasympathetic stimulation reduces heart rate.

Accepted Answer

A) True 
 B)False

Question 5

When the ventricles relax,the __________ valve prevents backflow of blood into the left ventricle.

Accepted Answer

A)   aortic
B)   pulmonary
C)   mitral
D)   left AV
E)   right AVF) A) and B)
G) D) and E)

Question 6

Pericardial fluid is found between the __________ and the __________.

Accepted Answer

A)   visceral pericardium;myocardium
B)   visceral pericardium;epicardium
C)   parietal;visceral membranes
D)   myocardium;endocardium
E)   epicardium;myocardiumF) B) and C)
G) C) and D)

Question 7

The plateau in the action potential of cardiac muscle results from the action of __________.

Accepted Answer

A)   Na+ inflow
B)   K+ inflow
C)   K+ outflow
D)   fast Ca2+ channels
E)   slow Ca2+ channelsF) B) and D)
G) C) and D)

Question 8

The volume of blood ejected by each ventricle in one minute is called the __________.

Accepted Answer

A)   cardiac reserve
B)   preload
C)   afterload
D)   stroke volume
E)   cardiac outputF) A) and E)
G) None of the above

Question 9

Which of the following is not a feature of cardiac muscle?

Accepted Answer

A)   They depend almost exclusively on aerobic respiration.
B)   They are rich in glycogen.
C)   They have larger than average mitochondria.
D)   They are very rich in myoglobin.
E)   They have about the same endurance as skeletal muscle fibers.F) C) and E)
G) D) and E)

Question 10

After entering the right atrium,the furthest a red blood cell can travel is the _________.

Accepted Answer

A)   right ventricle
B)   pulmonary trunk
C)   superior vena cava
D)   ascending aorta
E)   left atriumF) C) and E)
G) B) and D)

Question 11

Which of the following is a feature shared by cardiac muscle and skeletal muscle?

Accepted Answer

A)   Muscle fiber striations
B)   Dependence upon nervous stimulation
C)   Communication via electrical (gap) junctions
D)   Intercalated discs
E)   AutorhythmicityF) A) and B)
G) A) and C)

Question 12

Atrial depolarization causes the _________.

Accepted Answer

A)   P wave
B)   QRS complex
C)   T wave
D)   first heart sound
E)   quiescent periodF) A) and B)
G) A) and E)

Question 13

Which of the following directly stems from the ascending aorta before it branches into the circumflex branch and anterior interventricular branch?

Accepted Answer

A)   Right coronary artery
B)   Great cardiac vein
C)   Right coronary vein
D)   Left coronary artery
E)   Left coronary veinF) B) and C)
G) D) and E)

Question 14

Endurance athletes commonly have a resting heart rate as low as 40 bpm,and a stroke volume as low as 50 mL/beat.

Accepted Answer

A) True 
 B)False

Question 15

The __________ are the superior chambers of the heart and the _________ are the inferior chambers of the heart.

Accepted Answer

A)   visceral percardia;parietal pericardia
B)   ventricles;atria
C)   atria;ventricles
D)   left ventricles;right ventricles
E)   left atria;right atriaF) C) and E)
G) A) and B)

Exam 19: The Circulatory System: Heart

Which of the following is a feature shared by cardiac muscle and skeletal muscle?

Correct Answer
verified

The ventricles are almost empty at the end of ventricular diastole.

Correct Answer
verified

When the ventricles relax,the __________ valve prevents backflow of blood into the left ventricle.

Correct Answer
verified

Which of the following is not a feature of cardiac muscle?

Correct Answer
verified

The volume of blood ejected by each ventricle in one minute is called the __________.

Correct Answer
verified

Atrial depolarization causes the _________.

Correct Answer
verified

Endurance athletes commonly have a resting heart rate as low as 40 bpm,and a stroke volume as low as 50 mL/beat.

Correct Answer
verified

The __ are the superior chambers of the heart and the _ are the inferior chambers of the heart.

Correct Answer
verified

The plateau in the action potential of cardiac muscle results from the action of __________.

Correct Answer
verified

Pericardial fluid is found between the and the .

Correct Answer
verified

Blood in the heart chambers provides most of the myocardium's oxygen and nutrient needs.

Correct Answer
verified

Which of the following directly stems from the ascending aorta before it branches into the circumflex branch and anterior interventricular branch?

Correct Answer
verified

The systemic circuit contains oxygen-rich blood only.

Correct Answer
verified

After entering the right atrium,the furthest a red blood cell can travel is the _________.

Correct Answer
verified

Parasympathetic stimulation reduces heart rate.

Correct Answer
verified

Exam 19: The Circulatory System: Heart

Which of the following is a feature shared by cardiac muscle and skeletal muscle?

Correct AnswerverifiedShow Answer

The ventricles are almost empty at the end of ventricular diastole.

Correct AnswerverifiedShow Answer

When the ventricles relax,the __________ valve prevents backflow of blood into the left ventricle.

Correct AnswerverifiedShow Answer

Which of the following is not a feature of cardiac muscle?

Correct AnswerverifiedShow Answer

The volume of blood ejected by each ventricle in one minute is called the __________.

Correct AnswerverifiedShow Answer

Atrial depolarization causes the _________.

Correct AnswerverifiedShow Answer

Endurance athletes commonly have a resting heart rate as low as 40 bpm,and a stroke volume as low as 50 mL/beat.

Correct AnswerverifiedShow Answer

The __________ are the superior chambers of the heart and the _________ are the inferior chambers of the heart.

Correct AnswerverifiedShow Answer

The plateau in the action potential of cardiac muscle results from the action of __________.

Correct AnswerverifiedShow Answer

Pericardial fluid is found between the __________ and the __________.

Correct AnswerverifiedShow Answer

Blood in the heart chambers provides most of the myocardium's oxygen and nutrient needs.

Correct AnswerverifiedShow Answer

Which of the following directly stems from the ascending aorta before it branches into the circumflex branch and anterior interventricular branch?

Correct AnswerverifiedShow Answer

The systemic circuit contains oxygen-rich blood only.

Correct AnswerverifiedShow Answer

After entering the right atrium,the furthest a red blood cell can travel is the _________.

Correct AnswerverifiedShow Answer

Parasympathetic stimulation reduces heart rate.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The __ are the superior chambers of the heart and the _ are the inferior chambers of the heart.

Correct Answer
verified

Correct Answer
verified

Pericardial fluid is found between the and the .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified