Question 1

When listening to her heart, the doctor notices that Maria has a swishing sound immediately after the first heart sound is heard. Which of the following is correct?

Accepted Answer

A)  She has a heart murmur. 
B)  The sound occurs immediately after the AV valves close. 
C)  Maria may have an incompetent valve. 
D)  The sound is generated by the leakage of blood through a poorly closed valve. 
E)  All of the items are possible. 
A)  She has a heart murmur. 
B)  The sound occurs immediately after the AV valves close. 
C)  Maria may have an incompetent valve. 
D)  The sound is generated by the leakage of blood through a poorly closed valve. 
E)  All of the items are possible.

Question 2

Which of these is NOT part of an extrinsic regulatory mechanism of the heart?

Accepted Answer

A)  baroreceptor reflex 
B)  sympathetic or parasympathetic stimulation of the SA node 
C)  epinephrine secreted from the adrenal medulla 
D)  chemoreceptors for oxygen in the medulla oblongata 
E)  change in venous return 
A)  baroreceptor reflex 
B)  sympathetic or parasympathetic stimulation of the SA node 
C)  epinephrine secreted from the adrenal medulla 
D)  chemoreceptors for oxygen in the medulla oblongata 
E)  change in venous return

Question 3

Pulmonary edema normally follows soon after

Accepted Answer

A)  right heart failure. 
B)  left heart failure. 
C)  complete heart failure. 
D)  left ventricular hypertrophy. 
E)  primary hypertension. 
A)  right heart failure. 
B)  left heart failure. 
C)  complete heart failure. 
D)  left ventricular hypertrophy. 
E)  primary hypertension.

Question 4

The right atrium

Accepted Answer

A)  is the location of the pacemaker cells of a normal heart. 
B)  prevents blood flow from the right ventricle to the right atrium. 
C)  prevents blood flow from the left ventricle to the left atrium. 
D)  prevents blood flow from the pulmonary artery to the right ventricle. 
E)  prevents blood flow from the aorta to the left ventricle. 
A)  is the location of the pacemaker cells of a normal heart. 
B)  prevents blood flow from the right ventricle to the right atrium. 
C)  prevents blood flow from the left ventricle to the left atrium. 
D)  prevents blood flow from the pulmonary artery to the right ventricle. 
E)  prevents blood flow from the aorta to the left ventricle.

Question 5

The specialized __________ in the intercalated disks allow cytoplasm to flow freely between adjacent cells.

Accepted Answer

A)  valves 
B)  hemidesmosomes 
C)  desmosomes 
D)  gap junctions 
E)  tight junctions 
A)  valves 
B)  hemidesmosomes 
C)  desmosomes 
D)  gap junctions 
E)  tight junctions

Question 6

Depolarization of the atria is shown as the ______________ on an EKG.

Accepted Answer

A)  P wave 
B)  P-Q (or P-R) interval 
C)  QRS complex 
D)  Q-T interval 
E)  T wave 
A)  P wave 
B)  P-Q (or P-R) interval 
C)  QRS complex 
D)  Q-T interval 
E)  T wave

Question 7

In a normal electrocardiogram (ECG or EKG),

Accepted Answer

A)  the P wave results from repolarization of the atria. 
B)  the QRS complex results from depolarization of the ventricles. 
C)  the T wave represents repolarization of the ventricles. 
D)  during the P-R interval, the ventricles contract. 
E)  Both the QRS complex results from depolarization of the ventricles and the T wave represents repolarization of the ventricles are correct relationships. 
A)  the P wave results from repolarization of the atria. 
B)  the QRS complex results from depolarization of the ventricles. 
C)  the T wave represents repolarization of the ventricles. 
D)  during the P-R interval, the ventricles contract. 
E)  Both the QRS complex results from depolarization of the ventricles and the T wave represents repolarization of the ventricles are correct relationships.

Question 8

As a result of the long refractory period generated by __________, cardiac muscle can not exhibit __________.

Accepted Answer

A)  the influx of calcium ions, tetanus (tetanic contractions) 
B)  the out flow of K+, tetanus (tetanic contractions) 
C)  the influx of Na+, tetanus (tetanic contractions) 
D)  the influx of Ca++, recruitment 
E)  the out flow of K+, recruitment 
A)  the influx of calcium ions, tetanus (tetanic contractions) 
B)  the out flow of K+, tetanus (tetanic contractions) 
C)  the influx of Na+, tetanus (tetanic contractions) 
D)  the influx of Ca++, recruitment 
E)  the out flow of K+, recruitment

Question 9

Which of the following structures are able to spontaneous generate an action potential?

Accepted Answer

A)  the sinoatrial node (SA Node) 
B)  the atrioventricular node (AV Node) 
C)  the atrioventricular bundle 
D)  the right and left bundle branches 
E)  All of the items can spontaneously generate an action potential. 
A)  the sinoatrial node (SA Node) 
B)  the atrioventricular node (AV Node) 
C)  the atrioventricular bundle 
D)  the right and left bundle branches 
E)  All of the items can spontaneously generate an action potential.

Question 10

The atria of the heart

Accepted Answer

A)  are separated from each other by the interventricular septum. 
B)  function primarily as reservoirs for blood collection. 
C)  function primarily as the pumps of the heart. 
D)  receive blood from the aorta and pulmonary trunk. 
E)  have all of these characteristics. 
A)  are separated from each other by the interventricular septum. 
B)  function primarily as reservoirs for blood collection. 
C)  function primarily as the pumps of the heart. 
D)  receive blood from the aorta and pulmonary trunk. 
E)  have all of these characteristics.

Question 11

Papillary muscles:

Accepted Answer

A)  contract when the ventricles relax 
B)  prevent the valves from closing during ventricular diastole 
C)  are attached to the semi lunar valves via the chordae tendineae 
D)  prevent the backflow of blood into the atria during ventricular systole 
E)  prevent the backflow of blood into the ventricles from the aorta 
A)  contract when the ventricles relax 
B)  prevent the valves from closing during ventricular diastole 
C)  are attached to the semi lunar valves via the chordae tendineae 
D)  prevent the backflow of blood into the atria during ventricular systole 
E)  prevent the backflow of blood into the ventricles from the aorta

Question 12

Cutting the vagus nerve to the heart would be expected to cause

Accepted Answer

A)  the heart to quit beating. 
B)  the heart rate to decrease. 
C)  no change in heart rate. 
D)  the heart rate to increase. 
E)  an AV block. 
A)  the heart to quit beating. 
B)  the heart rate to decrease. 
C)  no change in heart rate. 
D)  the heart rate to increase. 
E)  an AV block.

Question 13

The aortic semilunar valve

Accepted Answer

A)  is the location of the pacemaker cells of a normal heart. 
B)  prevents blood flow from the right ventricle to the right atrium. 
C)  prevents blood flow from the left ventricle to the left atrium. 
D)  prevents blood flow from the pulmonary artery to the right ventricle. 
E)  prevents blood flow from the aorta to the left ventricle. 
A)  is the location of the pacemaker cells of a normal heart. 
B)  prevents blood flow from the right ventricle to the right atrium. 
C)  prevents blood flow from the left ventricle to the left atrium. 
D)  prevents blood flow from the pulmonary artery to the right ventricle. 
E)  prevents blood flow from the aorta to the left ventricle.

Question 14

The pulmonary semilunar valve

Accepted Answer

A)  is the location of the pacemaker cells of a normal heart. 
B)  prevents blood flow from the right ventricle to the right atrium. 
C)  prevents blood flow from the left ventricle to the left atrium. 
D)  prevents blood flow from the pulmonary artery to the right ventricle. 
E)  prevents blood flow from the aorta to the left ventricle. 
A)  is the location of the pacemaker cells of a normal heart. 
B)  prevents blood flow from the right ventricle to the right atrium. 
C)  prevents blood flow from the left ventricle to the left atrium. 
D)  prevents blood flow from the pulmonary artery to the right ventricle. 
E)  prevents blood flow from the aorta to the left ventricle.

Question 15

Letter B delivers blood

Accepted Answer

A)  from the left ventricle to the body. 
B)  from the left ventricle to the lungs. 
C)  from the right ventricle to the lungs. 
D)  from the right atrium to the vena cava. 
E)  from the right atrium to the body. 
A)  from the left ventricle to the body. 
B)  from the left ventricle to the lungs. 
C)  from the right ventricle to the lungs. 
D)  from the right atrium to the vena cava. 
E)  from the right atrium to the body.

Question 16

Letter C receives blood from the

Accepted Answer

A)  superior vena cava. 
B)  pulmonary veins. 
C)  aorta. 
D)  left atrium. 
E)  right ventricle. 
A)  superior vena cava. 
B)  pulmonary veins. 
C)  aorta. 
D)  left atrium. 
E)  right ventricle.

Question 17

Given these structures: 1) AV node
2) atrioventricular bundle
3) bundle branches
4) Purkinje fibers
Arrange these parts of the conduction system of the heart in the correct order, as an action potential would pass through them.

Accepted Answer

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

Question 18

Which of these factors would cause an increase in heart rate?

Accepted Answer

A)  increased parasympathetic stimulation 
B)  stimulation of baroreceptors in the aorta 
C)  a decrease in blood pH 
D)  a decrease in carbon dioxide in the blood 
E)  excess potassium ions 
A)  increased parasympathetic stimulation 
B)  stimulation of baroreceptors in the aorta 
C)  a decrease in blood pH 
D)  a decrease in carbon dioxide in the blood 
E)  excess potassium ions

Question 19

Which of these statements concerning the functional characteristics of the heart chambers is NOT correct?

Accepted Answer

A)  During ventricular diastole, blood collects in the right and left atria. 
B)  At the very beginning of ventricular diastole, blood flows directly from the atria into the relaxed ventricles. 
C)  70% of ventricular filling occurs before the atria contract. 
D)  During ventricular systole, the atrioventricular valves close. 
E)  During ventricular diastole, the semilunar valves open. 
A)  During ventricular diastole, blood collects in the right and left atria. 
B)  At the very beginning of ventricular diastole, blood flows directly from the atria into the relaxed ventricles. 
C)  70% of ventricular filling occurs before the atria contract. 
D)  During ventricular systole, the atrioventricular valves close. 
E)  During ventricular diastole, the semilunar valves open.

Question 20

All of the following are functions of the heart EXCEPT:

Accepted Answer

A)  generation of blood pressure 
B)  ensures one way flow of blood 
C)  generation of the formed elements of the blood 
D)  regulates rate and force of blood delivery 
E)  distributes oxygenated blood to tissues 
A)  generation of blood pressure 
B)  ensures one way flow of blood 
C)  generation of the formed elements of the blood 
D)  regulates rate and force of blood delivery 
E)  distributes oxygenated blood to tissues

When listening to her heart, the doctor notices that Maria has a swishing sound immediately after the first heart sound is heard. Which of the following is correct?

Which of these is NOT part of an extrinsic regulatory mechanism of the heart?

Pulmonary edema normally follows soon after

The right atrium

The specialized __________ in the intercalated disks allow cytoplasm to flow freely between adjacent cells.

Depolarization of the atria is shown as the ______________ on an EKG.

In a normal electrocardiogram (ECG or EKG),

As a result of the long refractory period generated by , cardiac muscle can not exhibit .

Which of the following structures are able to spontaneous generate an action potential?

The atria of the heart

Papillary muscles:

Cutting the vagus nerve to the heart would be expected to cause

The aortic semilunar valve

The pulmonary semilunar valve

Letter B delivers blood

Letter C receives blood from the

Given these structures: 1) AV node 2) atrioventricular bundle 3) bundle branches 4) Purkinje fibers Arrange these parts of the conduction system of the heart in the correct order, as an action potential would pass through them.

Which of these factors would cause an increase in heart rate?

Which of these statements concerning the functional characteristics of the heart chambers is NOT correct?

All of the following are functions of the heart EXCEPT:

The Human Organism

The Chemical Basis of Life

Cell Structures and Their Functions

Tissuesasis of Life

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, Heredity, and Aging

Filters

Exam 12: Heart

When listening to her heart, the doctor notices that Maria has a swishing sound immediately after the first heart sound is heard. Which of the following is correct?

Which of these is NOT part of an extrinsic regulatory mechanism of the heart?

Pulmonary edema normally follows soon after

The right atrium

The specialized __________ in the intercalated disks allow cytoplasm to flow freely between adjacent cells.

Depolarization of the atria is shown as the ______________ on an EKG.

In a normal electrocardiogram (ECG or EKG),

As a result of the long refractory period generated by __________, cardiac muscle can not exhibit __________.

Which of the following structures are able to spontaneous generate an action potential?

The atria of the heart

Papillary muscles:

Cutting the vagus nerve to the heart would be expected to cause

The aortic semilunar valve

The pulmonary semilunar valve

Letter B delivers blood

Letter C receives blood from the

Given these structures: 1) AV node 2) atrioventricular bundle 3) bundle branches 4) Purkinje fibers Arrange these parts of the conduction system of the heart in the correct order, as an action potential would pass through them.

Which of these factors would cause an increase in heart rate?

Which of these statements concerning the functional characteristics of the heart chambers is NOT correct?

All of the following are functions of the heart EXCEPT:

The Human Organism

The Chemical Basis of Life

Cell Structures and Their Functions

Tissuesasis of Life

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, Heredity, and Aging

Filters

As a result of the long refractory period generated by , cardiac muscle can not exhibit .