Ex. 17 The Heart in Mastering

C. Autorhythmicity

Cardiac muscle is capable of which of the following? A. Tetanus B. Wave summation C. Autorhythmicity D. All of the above

Aortic arch

Identify the structure labeled A

Atrial conducting fibers

Identify the structure labeled A

C. Sinoatrial (SA) node

Identify the structure labeled A. A. Atrioventricular (AV) node B. Purkinje fibers C. Sinoatrial (SA) node D. Bundle branch E. AV bundle

A. Right atrium

Identify the structure labeled A. A. Right atrium B. Left ventricle C. Left atrium D. Right ventricle

Left pulmonary artery

Identify the structure labeled B

Purkinje fiber system

Identify the structure labeled B

A. Atrioventricular (AV) node

Identify the structure labeled B. A. Atrioventricular (AV) node B. Purkinje fibers C. Sinoatrial (SA) node D. Bundle branch E. AV bundle

A. Tricuspid valve

Identify the structure labeled B. A. Tricuspid valve B. Aortic semilunar valve C. Bicuspid valve D. Pulmonary semilunar valve

AV bundle

Identify the structure labeled C

Left pulmonary veins

Identify the structure labeled C

E. AV bundle

Identify the structure labeled C. A. Atrioventricular (AV) node B. Purkinje fibers C. Sinoatrial (SA) node D. Bundle branch E. AV bundle

D. Right ventricle

Identify the structure labeled C. A. Right atrium B. Left ventricle C. Left atrium D. Right ventricle

Left atrium

Identify the structure labeled D

Right bundle branch

Identify the structure labeled D

D. Bundle branch

Identify the structure labeled D. A. Atrioventricular (AV) node B. Purkinje fibers C. Sinoatrial (SA) node D. Bundle branch E. AV bundle

B. Left ventricle

Identify the structure labeled D. A. Right atrium B. Left ventricle C. Left atrium D. Right ventricle

Circumflex artery

Identify the structure labeled E

Left bundle branch

Identify the structure labeled E

B. Purkinje fibers

Identify the structure labeled E. A. Atrioventricular (AV) node B. Purkinje fibers C. Sinoatrial (SA) node D. Bundle branch E. AV bundle

B. Aortic semilunar valve

Identify the structure labeled E. A. Tricuspid valve B. Aortic semilunar valve C. Bicuspid valve D. Pulmonary semilunar valve

Coronary sinus

Identify the structure labeled F

Purkinje fibers

Identify the structure labeled F

B. Aorta

Identify the structure labeled F. A. Superior vena cava B. Aorta C. Inferior vena cava D. Right pulmonary artery

Left ventricle

Identify the structure labeled G

Sinoatrial (SA) node

Identify the structure labeled G

Atrioventricular (AV) node

Identify the structure labeled H

Superior vena cava

Identify the structure labeled H

C. Bicuspid valve

Identify the structure labeled H. A. Tricuspid valve B. Aortic semilunar valve C. Bicuspid valve D. Pulmonary semilunar valve

Right atrium

Identify the structure labeled I

action potential

Identify the structure labeled I

B. Chordae tendineae

Identify the structure labeled I. A. Apex B. Chordae tendineae C. Interventricular septum D. Papillary muscle

Inferior vena cava

Identify the structure labeled J

contractile cells

Identify the structure labeled J

D. Papillary muscle

Identify the structure labeled J. A. Apex B. Chordae tendineae C. Interventricular septum D. Papillary muscle

Right coronary artery

Identify the structure labeled K

C. Interventricular septum

Identify the structure labeled K. A. Apex B. Chordae tendineae C. Interventricular septum D. Papillary muscle

Right ventricle

Identify the structure labeled L

Posterior interventricular artery

Identify the structure labeled M

A. increases; increases

Norepinephrine _______ the rate of depolarization of the heart and _______ the frequency of action potentials. A. increases; increases B. decreases; increases C. increases; decreases D. decreases; decreases

C. plateau phase

Phase 2 of the cardiac action potential, when the calcium channels are open and the potassium channels are closed, is called: A. threshold B. relative refractory period C. plateau phase D. absolute refractory period

B. potassium

Resting cardiac cells are most permeable to: A. calcium B. potassium C. magnesium D. sodium

C. right atrium.

The SA node is located in the A. left ventricle. B. right ventricle. C. right atrium. D. left atrium.

B. right atrium

The SA node is located in the: A. right ventricle B. right atrium C. left ventricle D. left atrium

D. decrease the heart rate.

The effect of the parasympathetic nervous system on the heart is to A. decrease the heart rate and decrease the force of contraction. B. increase the heart rate and increase the force of contraction. C. increase the heart rate. D. decrease the heart rate.

A. decrease the heart rate

The effect of the parasympathetic nervous system on the heart is to: A. decrease the heart rate B. increase the heart rate C. increase the heart rate and increase the force of contraction D. decrease the heart rate and decrease the force of contraction

A. sinoatrial node

The usual pacemaker of the heart is the: A. sinoatrial node B. Purkinje fibers C. atrioventricular node D. coronary sinus

E. Aorta

What blood vessel carries oxygenated blood out of the heart to the systemic circuit? A. Superior or inferior vena cava B. Pulmonary veins C. Pulmonary trunk D. Pulmonary arteries E. Aorta

D. Right ventricle

What chamber pumps deoxygenated blood out of the heart to the lungs? A. Left atrium B. Left ventricle C. Right atrium D. Right ventricle

C. Auricle of the right atrium

What is the structure labeled A? A. Right ventricle B. Left ventricle C. Auricle of the right atrium D. Auricle of the left atrium

A. Right ventricle

What is the structure labeled B? A. Right ventricle B. Left ventricle C. Auricle of the right atrium D. Auricle of the left atrium

B. Apex of the heart

What is the structure labeled C? A. Base of the heart B. Apex of the heart C. Aorta D. Aortic semilunar valve

C. Aorta

What is the structure labeled D? A. Base of the heart B. Apex of the heart C. Aorta D. Aortic semilunar valve

D. Aortic semilunar valve

What is the structure labeled E? A. Base of the heart B. Apex of the heart C. Aorta D. Aortic semilunar valve

D. Auricle of the left atrium

What is the structure labeled F? A. Right ventricle B. Left ventricle C. Auricle of the right atrium D. Auricle of the left atrium

B. Left ventricle

What is the structure labeled G? A. Right ventricle B. Left ventricle C. Auricle of the right atrium D. Auricle of the left atrium

D. Aortic semilunar (SL) valve

What valve prevents backflow of blood after it exits the heart when going to the systemic circuit? A. Tricuspid valve B. Bicuspid (mitral) valve C. Pulmonary semilunar (SL) valve D. Aortic semilunar (SL) valve

A. Bicuspid

Which atrioventricular valve is found on the left side of the heart? A. Bicuspid B. Aortic C. Tricuspid D. Pulmonary

D. bicuspid

Which atrioventricular valve is found on the left side of the heart? A. tricuspid B. aortic C. pulmonary D. bicuspid

C. pulmonary SL

Blood traveling through the pulmonary trunk has just passed through the _____ valve. A. tricuspid B. bicuspid C. pulmonary SL D. aortic SL

B. aortic SL

After leaving the left ventricle, blood travels through the _____ valve. A. tricuspid B. aortic SL C. pulmonary SL D. bicuspid

A. tricuspid

After leaving the right atrium, blood passes through the _____ valve. A. tricuspid B. aortic SL C. pulmonary SL D. bicuspid

D. hyperthermia

An internal body temperature that is above normal is called: A. hypothermia B. homeopathic C. homeothermic D. hyperthermia

B. superior vena cava

Blood from the head and neck will travel to the right atrium through the _____. A. inferior vena cava B. superior vena cava C. aorta D. coronary sinus

B. oxygen poor

Blood on the right side of the heart is mostly____. A. oxygen rich B. oxygen poor

C. right atrium

From the vena cavae, blood flows to the ______. A. coronary sinus B. right ventricle C. right atrium D. left ventricle

C. Left atrium

Identify the chamber labeled G. A. Right atrium B. Left ventricle C. Left atrium D. Right ventricle

Atrial depolarization

In the cardiac cycle, what does the P wave indicate? Ventricular depolarization Ventricular diastole Ventricular repolarization Ventricular systole Atrial depolarization Atrial systole

Atrial systole

In the cardiac cycle, what does the P-R interval indicate? Ventricular depolarization Ventricular diastole Ventricular repolarization Ventricular systole Atrial depolarization Atrial systole

Ventricular depolarization

In the cardiac cycle, what does the QRS complex indicate? Ventricular depolarization Ventricular diastole Ventricular repolarization Ventricular systole Atrial depolarization Atrial systole

Ventricular systole

In the cardiac cycle, what does the R-T interval indicate? Ventricular depolarization Ventricular diastole Ventricular repolarization Ventricular systole Atrial depolarization Atrial systole

Ventricular repolarization

In the cardiac cycle, what does the T wave indicate? Ventricular depolarization Ventricular diastole Ventricular repolarization Ventricular systole Atrial depolarization Atrial systole

Ventricular diastole

In the cardiac cycle, what does the T-R interval indicate? Ventricular depolarization Ventricular diastole Ventricular repolarization Ventricular systole Atrial depolarization Atrial systole