Question 1

Figure 20-2 Cardiac Cycle
  
Use Figure 20-2 to answer the following questions:
-What occurs at the area labeled "C" on the graph?

Accepted Answer

A)  AV valve opens. 
B)  AV valve closes. 
C)  Ventricular filling begins. 
D)  Semilunar valve closes. 
E)  Semilunar valve opens. 
A)  AV valve opens. 
B)  AV valve closes. 
C)  Ventricular filling begins. 
D)  Semilunar valve closes. 
E)  Semilunar valve opens.

Question 2

Which of the following describes what is directly measured by an ECG?

Accepted Answer

A)  the force of contractions 
B)  blood vessel resistance 
C)  end-systolic volume 
D)  electrical conduction 
E)  neural stimulation of cardiac myocytes 
A)  the force of contractions 
B)  blood vessel resistance 
C)  end-systolic volume 
D)  electrical conduction 
E)  neural stimulation of cardiac myocytes

Question 3

The atrioventricular valves permit blood flow

Accepted Answer

A)  in one direction only. 
B)  in both directions. 
C)  in many directions. 
D)  in opposite directions on the right and left. 
E)  from a ventricle to an atrium. 
A)  in one direction only. 
B)  in both directions. 
C)  in many directions. 
D)  in opposite directions on the right and left. 
E)  from a ventricle to an atrium.

Question 4

An ECG is used to diagnose all of the following conditions except

Accepted Answer

A)  an AV block. 
B)  an ectopic pacemaker. 
C)  angina pectoris. 
D)  premature atrial contractions. 
E)  ventricular tachycardia. 
A)  an AV block. 
B)  an ectopic pacemaker. 
C)  angina pectoris. 
D)  premature atrial contractions. 
E)  ventricular tachycardia.

Question 5

If the pacemaker cells in the SA node become more permeable to potassium ions, the

Accepted Answer

A)  heart rate will increase. 
B)  heart rate will decrease. 
C)  cells will depolarize. 
D)  cells will hyperpolarize. 
E)  heart rate will decrease and cells will hyperpolarize. 
A)  heart rate will increase. 
B)  heart rate will decrease. 
C)  cells will depolarize. 
D)  cells will hyperpolarize. 
E)  heart rate will decrease and cells will hyperpolarize.

Question 6

Pacemaker cells isolated from the SA node generate action potentials at ________ beats per minute.

Accepted Answer

A)  20-40 
B)  40-60 
C)  80-100 
D)  100-140 
E)  140-180 
A)  20-40 
B)  40-60 
C)  80-100 
D)  100-140 
E)  140-180

Question 7

The ________ carry blood away from the heart.

Accepted Answer

A)  arterioles 
B)  arteries 
C)  veins 
D)  venules 
E)  capillaries 
A)  arterioles 
B)  arteries 
C)  veins 
D)  venules 
E)  capillaries

Question 8

Drugs that block the beta-one adrenergic receptors will

Accepted Answer

A)  increase heart rate. 
B)  decrease heart rate. 
C)  increase contractility. 
D)  increase cardiac output. 
E)  decrease the end-systolic volume. 
A)  increase heart rate. 
B)  decrease heart rate. 
C)  increase contractility. 
D)  increase cardiac output. 
E)  decrease the end-systolic volume.

Question 9

Cardiac muscle layers form this distinct pattern.

Accepted Answer

A)  inner longitudinal layer 
B)  outer longitudinal layer 
C)  outer circular layer 
D)  figure eight 
E)  weave 
A)  inner longitudinal layer 
B)  outer longitudinal layer 
C)  outer circular layer 
D)  figure eight 
E)  weave

Question 10

The ________ is shared by the two ventricles.

Accepted Answer

A)  vena cava 
B)  bicuspid valve 
C)  chordae tendineae 
D)  interventricular septum 
E)  trabeculae carneae 
A)  vena cava 
B)  bicuspid valve 
C)  chordae tendineae 
D)  interventricular septum 
E)  trabeculae carneae

Question 11

The ________ covers the outer surface of the heart.

Accepted Answer

A)  epicardium 
B)  myocardium 
C)  endocardium 
D)  parietal pericardium 
E)  mediastinum 
A)  epicardium 
B)  myocardium 
C)  endocardium 
D)  parietal pericardium 
E)  mediastinum

Question 12

The marginal branch and posterior interventricular branch are branches of the

Accepted Answer

A)  right coronary artery. 
B)  left coronary artery. 
C)  circumflex artery. 
D)  coronary sinus. 
E)  aorta. 
A)  right coronary artery. 
B)  left coronary artery. 
C)  circumflex artery. 
D)  coronary sinus. 
E)  aorta.

Question 13

A tumor on the adrenal gland increasing catecholamine release will cause all of the following cardiovascular responses except

Accepted Answer

A)  decreased heart rate. 
B)  increased contractility. 
C)  increased venous return. 
D)  increased preload. 
E)  decreased ESV. 
A)  decreased heart rate. 
B)  increased contractility. 
C)  increased venous return. 
D)  increased preload. 
E)  decreased ESV.

Question 14

In an adult at rest, the end-diastolic volume is typically

Accepted Answer

A)  50 mL. 
B)  80 mL. 
C)  130 mL. 
D)  320 mL. 
E)  560 mL. 
A)  50 mL. 
B)  80 mL. 
C)  130 mL. 
D)  320 mL. 
E)  560 mL.

Question 15

Figure 20-2 Cardiac Cycle
  
Use Figure 20-2 to answer the following questions:
-What volume is labeled "E" on the graph?

Accepted Answer

A)  cardiac output 
B)  stroke volume 
C)  end-diastolic volume 
D)  end-systolic volume 
E)  total cardiac volume 
A)  cardiac output 
B)  stroke volume 
C)  end-diastolic volume 
D)  end-systolic volume 
E)  total cardiac volume

Question 16

The heart lies within the ________ cavity.

Accepted Answer

A)  peritoneal 
B)  pleural 
C)  orbital 
D)  dorsal 
E)  pericardial 
A)  peritoneal 
B)  pleural 
C)  orbital 
D)  dorsal 
E)  pericardial

Question 17

Thick projections of muscle in the ventricles that anchor chordae tendineae are called

Accepted Answer

A)  pectinate muscles. 
B)  conus arteriosus. 
C)  papillary muscles. 
D)  trabeculae carneae. 
E)  auricles. 
A)  pectinate muscles. 
B)  conus arteriosus. 
C)  papillary muscles. 
D)  trabeculae carneae. 
E)  auricles.

Question 18

Heart rate is controlled by neurons of the cardiovascular center located in the

Accepted Answer

A)  pons. 
B)  thalamus. 
C)  medulla oblongata. 
D)  hypothalamus. 
E)  higher centers. 
A)  pons. 
B)  thalamus. 
C)  medulla oblongata. 
D)  hypothalamus. 
E)  higher centers.

Question 19

These structures keep the aortic valve cusps from sticking to the wall of the aorta.

Accepted Answer

A)  auricles 
B)  chordae tendineae 
C)  papillary muscles 
D)  pectinate muscles 
E)  aortic sinuses 
A)  auricles 
B)  chordae tendineae 
C)  papillary muscles 
D)  pectinate muscles 
E)  aortic sinuses

Question 20

A slower-than-normal heart rate is called

Accepted Answer

A)  tachycardia. 
B)  bradycardia. 
C)  hypercardia. 
D)  hypocardia. 
E)  procardia. 
A)  tachycardia. 
B)  bradycardia. 
C)  hypercardia. 
D)  hypocardia. 
E)  procardia.

Exam 20: The Heart

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What occurs at the area labeled "C" on the graph?

Which of the following describes what is directly measured by an ECG?

The atrioventricular valves permit blood flow

An ECG is used to diagnose all of the following conditions except

If the pacemaker cells in the SA node become more permeable to potassium ions, the

Pacemaker cells isolated from the SA node generate action potentials at ________ beats per minute.

The ________ carry blood away from the heart.

Drugs that block the beta-one adrenergic receptors will

Cardiac muscle layers form this distinct pattern.

The ________ is shared by the two ventricles.

The ________ covers the outer surface of the heart.

The marginal branch and posterior interventricular branch are branches of the

A tumor on the adrenal gland increasing catecholamine release will cause all of the following cardiovascular responses except

In an adult at rest, the end-diastolic volume is typically

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What volume is labeled "E" on the graph?

The heart lies within the ________ cavity.

Thick projections of muscle in the ventricles that anchor chordae tendineae are called

Heart rate is controlled by neurons of the cardiovascular center located in the

These structures keep the aortic valve cusps from sticking to the wall of the aorta.

A slower-than-normal heart rate is called

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Bones and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Joints

Muscle Tissue

The Muscular System

Nervous Tissue

The Spinal Cord, Spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Sensory Pathways and the Somatic Nervous System

The Autonomic Nervous System and Higher-Order Functions

The Special Senses

The Endocrine System

Blood

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism, Nutrition, and Energetics

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

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