Question 1

Isovolumetric contraction of the left ventricle ends

Accepted Answer

A)  At the first heart sound 
B)  At the second heart sound 
C)  When left ventricular pressure exceeds aortic pressure 
D)  At the T wave 
E)  At the QRS com plex 
A)  At the first heart sound 
B)  At the second heart sound 
C)  When left ventricular pressure exceeds aortic pressure 
D)  At the T wave 
E)  At the QRS com plex C

Question 2

The tough fibrous sac that encases the heart is called the

Accepted Answer

A)  Pericardium 
B)  Peritoneum 
C)  Omentum 
D)  Perimysium 
E)  Endocardium 
A)  Pericardium 
B)  Peritoneum 
C)  Omentum 
D)  Perimysium 
E)  Endocardium A

Question 3

The function of the papillary muscles is to

Accepted Answer

A)  Hold valves open during ejection 
B)  Conduct electrical signals across the chamber 
C)  Push valves shut during ejection 
D)  Prevent prolapse of valves during ejection 
E)  Prevent regurgitation through the aortic valve 
A)  Hold valves open during ejection 
B)  Conduct electrical signals across the chamber 
C)  Push valves shut during ejection 
D)  Prevent prolapse of valves during ejection 
E)  Prevent regurgitation through the aortic valve D

Question 4

The aortic valve opens

Accepted Answer

A)  W hen right ventricular pressure exceeds aortic pressure 
B)  At the end of isovolumetric contraction of the left ventricle 
C)  W hen left atrial pressure exceeds left ventricular pressure 
D)  W hen right atrial pressure exceeds right ventricular pressure 
E)  At the beginning of atrial systole 
A)  W hen right ventricular pressure exceeds aortic pressure 
B)  At the end of isovolumetric contraction of the left ventricle 
C)  W hen left atrial pressure exceeds left ventricular pressure 
D)  W hen right atrial pressure exceeds right ventricular pressure 
E)  At the beginning of atrial systole

Question 5

Contraction of the left ventricle

Accepted Answer

A)  Occurs at the sam e time as contraction of the right ventricle 
B)  Occurs immediately after the aortic valve opens 
C)  Occurs immediately after the pulmonary valve opens 
D)  Ejects blood through the tricuspid valve into the aorta 
E)  Ejects blood through the m itral valve into the aorta 
A)  Occurs at the sam e time as contraction of the right ventricle 
B)  Occurs immediately after the aortic valve opens 
C)  Occurs immediately after the pulmonary valve opens 
D)  Ejects blood through the tricuspid valve into the aorta 
E)  Ejects blood through the m itral valve into the aorta

Question 6

The ejection fraction is

Accepted Answer

A)  End diastolic volume - end systolic volume 
B)  End systolic volume - end diastolic volume 
C)  Stroke volume / end systolic volume 
D)  Stroke volume / end diastolic volume 
E)  The fraction of the circulatory volum e that is pumped out of the heart each minute 
A)  End diastolic volume - end systolic volume 
B)  End systolic volume - end diastolic volume 
C)  Stroke volume / end systolic volume 
D)  Stroke volume / end diastolic volume 
E)  The fraction of the circulatory volum e that is pumped out of the heart each minute

Question 7

In the aorta with a given radius, turbulent flow is more likely when

Accepted Answer

A)  Pressure in the aorta increases 
B)  Blood flow increases 
C)  Viscosity of the blood increases 
D)  Density of the blood decreases 
E)  Heart rate decreases 
A)  Pressure in the aorta increases 
B)  Blood flow increases 
C)  Viscosity of the blood increases 
D)  Density of the blood decreases 
E)  Heart rate decreases

Question 8

Blood in the left atria

Accepted Answer

A)  Enters the left ventricle through the tricuspid valve 
B)  Enters the left ventricle through the mitral valve 
C)  Enters the left ventricle with no valve 
D)  Surrounds the papillary muscles 
E)  Is depleted of oxygen 
A)  Enters the left ventricle through the tricuspid valve 
B)  Enters the left ventricle through the mitral valve 
C)  Enters the left ventricle with no valve 
D)  Surrounds the papillary muscles 
E)  Is depleted of oxygen

Question 9

The aortic pressure exceeds the pulm onary pressure by a factor of about 5. According to the Law of LaPlace, you would expect

Accepted Answer

A)  The left ventricle to have a greater wall tension than the right ventricle during contraction 
B)  Because of its greater thickness, the left ventricle has the same wall tension as the right ventricle 
C)  Because of its greater thickness, the left ventricle has less wall tension than the right ventricle 
D)  Because of the different thickness, no conclusion can be made about relative wall tension between right and left ventricles 
E)  The left ventricle ejects less blood than the right ventricle 
A)  The left ventricle to have a greater wall tension than the right ventricle during contraction 
B)  Because of its greater thickness, the left ventricle has the same wall tension as the right ventricle 
C)  Because of its greater thickness, the left ventricle has less wall tension than the right ventricle 
D)  Because of the different thickness, no conclusion can be made about relative wall tension between right and left ventricles 
E)  The left ventricle ejects less blood than the right ventricle

Question 10

The cause of the second heart sound is

Accepted Answer

A)  Closure of the m itral valve 
B)  Closure of the tricuspid valve 
C)  Closure of both mitral and tricuspid valves 
D)  Closure of the aortic valve 
E)  Closure of both aortic and pulmonary valves 
A)  Closure of the m itral valve 
B)  Closure of the tricuspid valve 
C)  Closure of both mitral and tricuspid valves 
D)  Closure of the aortic valve 
E)  Closure of both aortic and pulmonary valves

Question 11

The cause of the first heart sound is

Accepted Answer

A)  Closure of the m itral valve 
B)  Closure of the tricuspid valve 
C)  Closure of both mitral and tricuspid valves 
D)  Closure of the aortic valve 
E)  Closure of both aortic and pulmonary valves 
A)  Closure of the m itral valve 
B)  Closure of the tricuspid valve 
C)  Closure of both mitral and tricuspid valves 
D)  Closure of the aortic valve 
E)  Closure of both aortic and pulmonary valves

Question 12

Blood in the vena cavae

Accepted Answer

A)  Enters the right atria through the m itral valve 
B)  Enters the right atria through the tricuspid valve 
C)  Enters the right atria with no valve 
D)  Enters the left atria through the m itral valve 
E)  Enters the left atria through the tricuspid valve 
A)  Enters the right atria through the m itral valve 
B)  Enters the right atria through the tricuspid valve 
C)  Enters the right atria with no valve 
D)  Enters the left atria through the m itral valve 
E)  Enters the left atria through the tricuspid valve

Question 13

Diastole is the

Accepted Answer

A)  Closed opening between right and left atria during embryogenesis 
B)  Period of heart relaxation 
C)  Highest pressure in the aorta 
D)  Period of heart contraction 
E)  Period of blood ejection 
A)  Closed opening between right and left atria during embryogenesis 
B)  Period of heart relaxation 
C)  Highest pressure in the aorta 
D)  Period of heart contraction 
E)  Period of blood ejection

Question 14

Systole is the

Accepted Answer

A)  Closed opening between right and left atria during embryogenesis 
B)  Period of heart relaxation 
C)  Highest pressure in the aorta 
D)  Period of heart contraction 
E)  Period of blood ejection 
A)  Closed opening between right and left atria during embryogenesis 
B)  Period of heart relaxation 
C)  Highest pressure in the aorta 
D)  Period of heart contraction 
E)  Period of blood ejection

Question 15

Turbulent flow in the heart itself is detected by

Accepted Answer

A)  Echocardiography 
B)  Murmurs detected by auscultation 
C)  EKG abnormalities 
D)  Non-simultaneous first or second heart sounds 
E)  Regurgitation 
A)  Echocardiography 
B)  Murmurs detected by auscultation 
C)  EKG abnormalities 
D)  Non-simultaneous first or second heart sounds 
E)  Regurgitation

Question 16

Blood in the right ventricle

Accepted Answer

A)  Exits the heart into the pulmonary artery 
B)  Exits the heart into the pulm onary vein 
C)  Exits the heart through the mitral valve 
D)  Exits the heart through the tricuspid valve 
E)  Exits the heart into the aorta 
A)  Exits the heart into the pulmonary artery 
B)  Exits the heart into the pulm onary vein 
C)  Exits the heart through the mitral valve 
D)  Exits the heart through the tricuspid valve 
E)  Exits the heart into the aorta

Question 17

Blood in the left ventricle exits the heart through the

Accepted Answer

A)  Pulmonary valve into the pulmonary artery 
B)  Pulmonary valve into the pulmonary vein 
C)  Aortic valve into the aorta 
D)  Tricuspid valve into the aorta 
E)  Mitral valve into the pulmonary artery 
A)  Pulmonary valve into the pulmonary artery 
B)  Pulmonary valve into the pulmonary vein 
C)  Aortic valve into the aorta 
D)  Tricuspid valve into the aorta 
E)  Mitral valve into the pulmonary artery

Question 18

The tricuspid valve closes when

Accepted Answer

A)  The right atria contracts 
B)  The left atria contracts 
C)  The right ventricle contracts 
D)  The left ventricle contracts 
E)  The second heart sound occurs 
A)  The right atria contracts 
B)  The left atria contracts 
C)  The right ventricle contracts 
D)  The left ventricle contracts 
E)  The second heart sound occurs

Question 19

According to the Law of LaPlace, generation of higher pressure at a given radius

Accepted Answer

A)  Requires greater wall tension 
B)  Requires more shortening to lessen r 
C)  Requires less tension but more curvature 
D)  Cannot occur 
E)  Requires laminar flow 
A)  Requires greater wall tension 
B)  Requires more shortening to lessen r 
C)  Requires less tension but more curvature 
D)  Cannot occur 
E)  Requires laminar flow

Question 20

The heart is

Accepted Answer

A)  Bilaterally symmetric and located vertically in the thoracic cavity 
B)  Thicker on the left and located obliquely in the thorax with its apex on the left 
C)  Bilaterally symm etric but located obliquely in the thorax with its apex on the left 
D)  Thicker on the right and located obliquely in the thorax with its apex on the right 
E)  Thicker on the left and located obliquely in the thorax with its apex on the right 
A)  Bilaterally symmetric and located vertically in the thoracic cavity 
B)  Thicker on the left and located obliquely in the thorax with its apex on the left 
C)  Bilaterally symm etric but located obliquely in the thorax with its apex on the left 
D)  Thicker on the right and located obliquely in the thorax with its apex on the right 
E)  Thicker on the left and located obliquely in the thorax with its apex on the right

Exam 37: The Heart As a Pump

Isovolumetric contraction of the left ventricle ends

The tough fibrous sac that encases the heart is called the

The function of the papillary muscles is to

The aortic valve opens

Contraction of the left ventricle

The ejection fraction is

In the aorta with a given radius, turbulent flow is more likely when

Blood in the left atria

The aortic pressure exceeds the pulm onary pressure by a factor of about 5. According to the Law of LaPlace, you would expect

The cause of the second heart sound is

The cause of the first heart sound is

Blood in the vena cavae

Diastole is the

Systole is the

Turbulent flow in the heart itself is detected by

Blood in the right ventricle

Blood in the left ventricle exits the heart through the

The tricuspid valve closes when

According to the Law of LaPlace, generation of higher pressure at a given radius

The heart is

Physical Foundations Ii: Electrical Force Potential Capacitance and Current

Chemical Foundations I: Chemical Energy and Intermolecular Forces

Chemical Foundations Ii: Concentration and Kinetics

Diffusion

Electrochemical Potential and Free Energy

Cell Structure

Dna and Protein Synthesis

Protein Structure

Biological Membranes

Passive Transport and Facilitated Diffusion

Active Transport: Pumps and Exchangers

Osmosis and Osmotic Pressure

Cell Signaling

ATP Production I: Glycolysis

Atp Production Ii: Tca Cycle and Oxidative Phosphorylation

Atp Production Iii: Fatty Acid Oxidation and Amino Acid Oxidation

Origin of the Membrane Potential

The Action Potential

Propagation of the Action Potential

Skeletal Muscle Mechanics

Contractile Mechanisms in Skeletal Muscle

Neuromuscular Junction and Ec Coupling

Muscle Energetics Fatigue and Training

Smooth Muscle

Organization of the Nervous System

Cells Synapses and Neurotransmitters

Cutaneous Sensory Systems

Spinal Reflexes

Balance and Control of Movement

the Chemical Senses

Hearing

Vision

Autonomic Nervous System

Overview of the Cv System and Blood

Plasma and Red Blood Cells

White Blood Cells and Inflammation

Cellular Basis of Cardiac Contractility

the Cardiac Function Curve

Vascular Function: Hemodynamics

Microcirculation and Solute Exchange

Regulation of Perfusion

Integration of Cardiac Output and Venous Return

Regulation of Arterial Pressure

Mechanics of Breathing

Lung Volumes and Airway Resistance

Gas Exchange in the Lung

Oxygen and Carbon Dioxide Transport

Acid Base Physiology I Bicarbonate Buffers and Respiratory Compensation

Control of Ventilation

Anatomy and Renal Overview

Glomerular Filtration

Tubular Reabsorption and Secretion

Concentration and Dilution of Urine

Mouth and Esophagus

The Stomach

Intestinal and Colonic Motility

Pancreatic and Biliary Secretion

Digestion and Absorption of the Macronutrients

Energy Balance and Regulation of Food Intake