Question 1

In a normal electrocardiogram, the

Accepted Answer

A)  P wave results from repolarization of the atria. 
B)  QRS complex results from ventricular depolarization. 
C)  P wave occurs after the QRS complex but before the T wave. 
D)  T wave represents depolarization of the atria. 
E)  repolarization of the atria is clearly visible. 
A)  P wave results from repolarization of the atria. 
B)  QRS complex results from ventricular depolarization. 
C)  P wave occurs after the QRS complex but before the T wave. 
D)  T wave represents depolarization of the atria. 
E)  repolarization of the atria is clearly visible.

Question 2

During the isovolumetric contraction period of the cardiac cycle,

Accepted Answer

A)  AV and semilunar valves are closed. 
B)  the atria are contracted. 
C)  ventricular volume increases. 
D)  blood is pumped into the large arteries. 
E)  pressure in the ventricles decreases. 
A)  AV and semilunar valves are closed. 
B)  the atria are contracted. 
C)  ventricular volume increases. 
D)  blood is pumped into the large arteries. 
E)  pressure in the ventricles decreases.

Question 3

Baroreceptor reflexes

Accepted Answer

A)  are triggered by increased blood osmolality. 
B)  correct changes in blood pH. 
C)  do not impact the activity of the heart. 
D)  are of minor importance in humans. 
E)  can change heart rate. 
A)  are triggered by increased blood osmolality. 
B)  correct changes in blood pH. 
C)  do not impact the activity of the heart. 
D)  are of minor importance in humans. 
E)  can change heart rate.

Question 4

Which vessels transport blood to the right and left lungs?

Accepted Answer

A)  aorta 
B)  right atrium 
C)  pulmonary trunk 
D)  pulmonary arteries 
E)  pulmonary veins 
A)  aorta 
B)  right atrium 
C)  pulmonary trunk 
D)  pulmonary arteries 
E)  pulmonary veins

Question 5

Excess potassium ions in cardiac tissue cause

Accepted Answer

A)  an increased heart rate. 
B)  a rapid repolarization of cardiac cells. 
C)  a decrease in the frequency of action potentials in the conduction system. 
D)  an increase in stroke volume. 
E)  an increase in the frequency of action potentials. 
A)  an increased heart rate. 
B)  a rapid repolarization of cardiac cells. 
C)  a decrease in the frequency of action potentials in the conduction system. 
D)  an increase in stroke volume. 
E)  an increase in the frequency of action potentials.

Question 6

The heart

Accepted Answer

A)  is a four-chambered muscular pump. 
B)  is posterior to the trachea. 
C)  is lined with an epithelial layer called epicardium. 
D)  lies mostly to the right of the midline of the sternum. 
E)  has a superior apex and an inferior base. 
A)  is a four-chambered muscular pump. 
B)  is posterior to the trachea. 
C)  is lined with an epithelial layer called epicardium. 
D)  lies mostly to the right of the midline of the sternum. 
E)  has a superior apex and an inferior base.

Question 7

An incompetent mitral valve may cause blood to back up into the

Accepted Answer

A)  aorta. 
B)  left atrium. 
C)  left ventricle. 
D)  coronary circulation. 
E)  right atrium. 
A)  aorta. 
B)  left atrium. 
C)  left ventricle. 
D)  coronary circulation. 
E)  right atrium.

Question 8

What cardiac arrhythmia will have no QRS complex as a symptom?

Accepted Answer

A)  atrial fibrillation 
B)  ventricular fibrillation 
C)  bradycardia 
D)  premature ventricular contractions 
A)  atrial fibrillation 
B)  ventricular fibrillation 
C)  bradycardia 
D)  premature ventricular contractions

Question 9

The chamber of the heart that endures the highest pressure is the

Accepted Answer

A)  right atrium. 
B)  left atrium. 
C)  right ventricle. 
D)  left ventricle. 
E)  coronary sinus. 
A)  right atrium. 
B)  left atrium. 
C)  right ventricle. 
D)  left ventricle. 
E)  coronary sinus.

Question 10

The relationship between preload and stroke volume is known as

Accepted Answer

A)  extrinsic regulation. 
B)  cardiac reserve. 
C)  Starling Law of the heart. 
D)  minute volume. 
A)  extrinsic regulation. 
B)  cardiac reserve. 
C)  Starling Law of the heart. 
D)  minute volume.

Question 11

Contraction of the ventricles is referred to as ventricular

Accepted Answer

A)  systole. 
B)  diastole. 
C)  fibrillation. 
D)  ischemia. 
E)  depolarization. 
A)  systole. 
B)  diastole. 
C)  fibrillation. 
D)  ischemia. 
E)  depolarization.

Question 12

The chordae tendineae

Accepted Answer

A)  connect the atria to the ventricles. 
B)  are found in the interventricular septum. 
C)  are part of the conducting system of the heart. 
D)  connect the flaps of the AV valves to the papillary muscles. 
E)  are a part of the myocardium. 
A)  connect the atria to the ventricles. 
B)  are found in the interventricular septum. 
C)  are part of the conducting system of the heart. 
D)  connect the flaps of the AV valves to the papillary muscles. 
E)  are a part of the myocardium.

Question 13

The product of the stroke volume times the heart rate is known as the

Accepted Answer

A)  end-diastolic volume. 
B)  end-systolic volume. 
C)  cardiac output. 
D)  cardiac reserve. 
E)  venous return. 
A)  end-diastolic volume. 
B)  end-systolic volume. 
C)  cardiac output. 
D)  cardiac reserve. 
E)  venous return.

Question 14

The valve located between the right ventricle and the pulmonary trunk is the

Accepted Answer

A)  aortic semilunar valve. 
B)  pulmonary semilunar valve. 
C)  tricuspid valve. 
D)  mitral valve. 
E)  bicuspid valve. 
A)  aortic semilunar valve. 
B)  pulmonary semilunar valve. 
C)  tricuspid valve. 
D)  mitral valve. 
E)  bicuspid valve.

Question 15

Which of the following is mismatched?

Accepted Answer

A)  opening of sodium channels - depolarization 
B)  closing of calcium channels - plateau phase 
C)  opening of potassium channels - rapid repolarization 
D)  closure of sodium channels - early repolarization 
E)  opening of calcium channels - plateau phase 
A)  opening of sodium channels - depolarization 
B)  closing of calcium channels - plateau phase 
C)  opening of potassium channels - rapid repolarization 
D)  closure of sodium channels - early repolarization 
E)  opening of calcium channels - plateau phase

Question 16

Which vessels empty blood into the left atrium?

Accepted Answer

A)  aorta 
B)  right atrium 
C)  pulmonary trunk 
D)  pulmonary arteries 
E)  pulmonary veins 
A)  aorta 
B)  right atrium 
C)  pulmonary trunk 
D)  pulmonary arteries 
E)  pulmonary veins

Question 17

When comparing cardiac muscle cells and skeletal muscle cells,

Accepted Answer

A)  the rate of action potential propagation is faster in cardiac muscle. 
B)  both possess intercalated discs. 
C)  only skeletal muscle has a plateau phase in its contraction cycle. 
D)  action potentials are conducted from cell to cell only in cardiac muscle. 
E)  both are voluntary. 
A)  the rate of action potential propagation is faster in cardiac muscle. 
B)  both possess intercalated discs. 
C)  only skeletal muscle has a plateau phase in its contraction cycle. 
D)  action potentials are conducted from cell to cell only in cardiac muscle. 
E)  both are voluntary.

Question 18

Match the drug with its effects.
-beta blocking agent

Accepted Answer

A) binds to epinephrine receptors 
B) prevents clot formation 
C) can reduce calcium diffusion rate into myocardial cells 
D) frequently given to people with restricted coronary blood flow in order to reduce preload 
E) used to treat high blood pressure 
A) binds to epinephrine receptors 
B) prevents clot formation 
C) can reduce calcium diffusion rate into myocardial cells 
D) frequently given to people with restricted coronary blood flow in order to reduce preload 
E) used to treat high blood pressure

Question 19

Use the following two choices:
-$\uparrow$ in ECF Ca2+ levels

Accepted Answer

A) ↑ heart rate 
B) ↓ heart rate 
A) ↑ heart rate 
B) ↓ heart rate

Question 20

Variations in respiratory rate is a symptom of

Accepted Answer

A)  sinus arrhythmia. 
B)  ventricular tachycardia. 
C)  SA node block. 
D)  paroxysmal atrial tachycardia 
A)  sinus arrhythmia. 
B)  ventricular tachycardia. 
C)  SA node block. 
D)  paroxysmal atrial tachycardia

Exam 20: Cardiovascular System: the Heart

In a normal electrocardiogram, the

During the isovolumetric contraction period of the cardiac cycle,

Baroreceptor reflexes

Which vessels transport blood to the right and left lungs?

Excess potassium ions in cardiac tissue cause

The heart

An incompetent mitral valve may cause blood to back up into the

What cardiac arrhythmia will have no QRS complex as a symptom?

The chamber of the heart that endures the highest pressure is the

The relationship between preload and stroke volume is known as

Contraction of the ventricles is referred to as ventricular

The chordae tendineae

The product of the stroke volume times the heart rate is known as the

The valve located between the right ventricle and the pulmonary trunk is the

Which of the following is mismatched?

Which vessels empty blood into the left atrium?

When comparing cardiac muscle cells and skeletal muscle cells,

Match the drug with its effects. -beta blocking agent

Use the following two choices: - ↑\uparrow↑ in ECF Ca2+ levels

Variations in respiratory rate is a symptom of

The Human Organism

The Chemical Basis of Life

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

Urinary System

Water, Electrolytes, and Acidbase Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters

Use the following two choices: - $\uparrow$ in ECF Ca²⁺ levels