The Heart--Mastering A&P

What vessel(s) deliver oxygenated blood to the left atrium? -pulmonary trunk -pulmonary arteries -aorta -pulmonary veins

-pulmonary veins

The amount of blood remaining in each ventricle at the end of the ventricular ejection phase is normally about: 120 ml. 30 ml. 70 ml. 50 ml.

50 mL

How much blood is pumped from each ventricle during the ventricular ejection phase? 70 ml 50 ml 120 ml 90 ml

70 mL

Which of the following volumes should be the greatest? A. cardiac output (CO) B. stroke volume (SV) C. end-systolic volume (ESV) D. end-diastolic volume (EDV)

A. cardiac output (CO)

Stroke volume averages about: A. 25 ml per heartbeat. B. 70 ml per heartbeat. C. 120 ml per heartbeat. D. 180 ml per heartbeat.

B. 70 ml per heartbeat.

The right and left coronary arteries receive blood from the: A. coronary sinus. B. aorta. C. superior vena cava. D. pulmonary trunk.

B. aorta.

What is NOT part of the cardiac conduction system? A. sinoatrial sinoatrial (SA) node B. atrioventricular (AV) valve C. atrioventricular (AV) bundle D. atrioventricular (AV) node

B. atrioventricular (AV) valve

Blood in the right ventricle arrived from the: A. pulmonary trunk. B. right atrium. C. bicuspid (mitral) valve. D. pulmonary valve.

B. right atrium

What produces the "lub dub" heart sounds? A. the relaxation of the atria, and then the ventricles B. the vibrations of the ventricular and blood vessel walls when valves shut C. the contraction of the atria, and then the ventricles D. the sound of blood traveling through the heart

B. the vibrations of the ventricular and blood vessel walls when valves shut

Which of the following is NOT a population of pacemaker cells in the heart? A. sinoatrial (SA) node B. Purkinje fiber system C. papillary muscles D. atrioventricular (AV) node

C. papillary muscles

The volume of blood pumped by each ventricle in one heartbeat is known as: A. end-diastolic volume (EDV). B. heart rate (HR). C. stroke volume (SV). D. cardiac output (CO).

C. stroke volume (SV).

What valve prevents the backflow of blood from the right ventricle into the right atrium? A. bicuspid (mitral) valve B. pulmonary valve C. tricuspid valve D. aortic valve

C. tricuspid valve

Predict the position of the valves during the ventricular ejection phase. A. The AV valves and semilunar valves are shut. B. The AV valves and semilunar valves are forced open. C. The AV valves are forced open while both semilunar valves are shut. D. The AV valves are shut while both semilunar valves are forced open.

D. The AV valves are shut while both semilunar valves are forced open.

Which valve is situated between the left atrium and left ventricle? A. aortic valve B. pulmonary valve C. tricuspid valve D. bicuspid (mitral) valve

D. bicuspid (mitral) valve

The right side of the heart receives: A. oxygenated blood from the systemic circuit. B. oxygenated blood from the pulmonary circuit. C. deoxygenated blood from the pulmonary circuit. D. deoxygenated blood from the systemic circuit.

D. deoxygenated blood from the systemic circuit.

What is the most superficial layer of the pericardial sac? A. epicardium B. parietal pericardium C. visceral pericardium D. fibrous pericardium

D. fibrous pericardium

Which of the following does NOT return blood to the right atrium of the heart? A. inferior vena cava B. coronary sinus C. superior vena cava D. pulmonary vein

D. pulmonary vein

Which of the following vessels carries oxygenated blood? A. pulmonary trunk B. superior vena cava C. pulmonary artery D. pulmonary vein

D. pulmonary vein

What normally serves as the pacemaker of the entire heart? A. atrioventricular (AV) bundle B. atrioventricular (AV) node C. Purkinje fiber system D. sinoatrial (SA) node

D. sinoatrial (SA) node

Which of the following pacemaker cell populations has the fastest intrinsic rate of depolarization at about 60-70 times or more per minute? A. atrioventricular (AV) bundle B. Purkinje fiber system C. atrioventricular (AV) node D. sinoatrial (SA) node

D. sinoatrial (SA) node

Which cranial nerves have a negative chronotropic effect on heart rate? A. glossopharyngeal nerves (CN IX) B. trochlear nerves (CN IV) C. hypoglossal nerves (CN XII) D. vagus nerves (CN X)

D. vagus nerves (CN X)

K interventricular septum

Identify the interventricular septum. E B I G J K

J left ventricle

Identify the left ventricle. K G B I E J

G mitral (bicuspid) valve

Identify the mitral (bicuspid) valve. I G J K E B

I papillary muscle

Identify the papillary muscle. B E K G J I

E pulmonary trunk

Identify the pulmonary trunk. E I J B G K

B right atrium

Identify the right atrium. E B G K J I

Which of the following can be used to measure heart rate? -R-R interval -Q-T interval -P-R interval -S-T segment

R-R interval

Which vessel supplies the systemic circuit with oxygenated blood? coronary sinus pulmonary trunk superior vena cava aorta

aorta

Autorhythmicity in the heart is the responsibility of: -skeletal muscle cells. -smooth muscle cells. -cardiac pacemaker cells. -contractile cells.

cardiac pacemaker cells

Generally, coronary veins empty into a vessel known as the: superior vena cava. aorta. coronary sinus. inferior vena cava.

coronary sinus

The visceral pericardium is the same as the: endocardium. fibrous pericardium. epicardium. myocardium.

epicardium

What characteristic differentiates cardiac muscle cells from skeletal muscle cells?

intercalated discs

The pulmonary circuit involves blood flow from the heart to the: liver. body. brain. lungs.

lungs

The heart is situated in the middle of the thoracic cavity in a region known as the:

mediastinum

What muscles, present in the ventricles, anchor the atrioventricular valves by tendon-like chords called chordae tendineae? -pectinate muscles -trabeculae carneae -ligamentum arteriosum -papillary muscles

papillary muscles

What is found between the visceral pericardium and the parietal pericardium? pericardial fluid the heart the lungs fibrous pericardium

pericardial fluid

What is the function of the valves in the heart?

prevent back flow of blood through the heart

Which vessel is guarded by a semilunar valve at its base?

pulmonary trunk

What normally serves as the pacemaker of the entire heart? -Purkinje fiber system -atrioventricular (AV) bundle -sinoatrial (SA) node -atrioventricular (AV) node

sinoatrial (SA) node

Archie has a resting heart rate of 125 beats per minute. Classify his cardiac dysrhythmia.

tachycardia