BIOL 252 Human Anatomy & Physiology II w/Lab Module 2
Cardiovascular System – The Heart Exam Actual Exam 2026/2027
with Detailed Rationales | Complete Exam-Style Questions | Graded
A+ Pass Guaranteed
Total Questions: 70 | Time: 90 min | Pass: 80%
TABLE OF CONTENTS
Section 1 | Heart Anatomy (Chambers, Valves, Great Vessels) | Q1 – Q14
Section 2 | Cardiac Muscle & Conduction System | Q15 – Q28
Section 3 | Cardiac Cycle & Electrical Events (ECG) | Q29 – Q42
Section 4 | Blood Flow, Hemodynamics, & Cardiac Output | Q43 – Q56
Section 5 | Regulation of Heart Function & Clinical Correlates | Q57 – Q70
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
══════════════════════════════════════
SECTION 1: HEART ANATOMY (CHAMBERS, VALVES, GREAT VESSELS) Q1 – Q14
══════════════════════════════════════
Question 1 of 70
A 58-year-old man arrives in the emergency department complaining of crushing chest
pain. During the physical exam, the physician places a stethoscope at the left fifth
intercostal space just medial to the midclavicular line and hears a harsh holosystolic
murmur. This auscultation point is directly over the apex of the heart, which is formed
primarily by which chamber?
A. The right atrium
B. The left atrium
C. The left ventricle
D. The right ventricle
Correct Answer: C
Rationale: The apex of the heart is formed almost entirely by the left ventricle, which is
the thickest and most muscular chamber because it must pump blood to the entire
,systemic circulation. The right ventricle forms most of the anterior surface of the heart
but contributes only slightly to the apex. In clinical practice, the apex beat is the point of
maximal impulse and is the standard location for assessing left ventricular function.
Question 2 of 70
During a cadaveric dissection in the anatomy lab, a first-year student is tracing the path
of blood from the superior vena cava into the heart. She notes that blood enters the
right atrium and must pass through a valve before entering the right ventricle. This valve
is characterized by having three cusps and being anchored by fibrous threads to
papillary muscles. Which valve is the student observing?
A. The bicuspid valve
B. The tricuspid valve
C. The aortic semilunar valve
D. The pulmonary semilunar valve
Correct Answer: B
Rationale: The tricuspid valve sits between the right atrium and right ventricle and has
three cusps anchored by chordae tendineae to papillary muscles, preventing backflow
during ventricular systole. The bicuspid valve is located on the left side and has only two
cusps, while semilunar valves lack chordae tendineae entirely. Students often confuse
the tricuspid and bicuspid valves because both are atrioventricular valves, but the side
of the heart and cusp number are the distinguishing features.
Question 3 of 70
A 72-year-old woman with chronic heart failure is undergoing an echocardiogram. The
sonographer identifies a thin-walled chamber located superior and slightly posterior to a
thick-walled chamber on the same side of the heart. The thin-walled chamber receives
oxygenated blood returning from the lungs via four separate vessels. Which chamber is
the sonographer describing?
,A. The right atrium
B. The right ventricle
C. The left atrium
D. The left ventricle
Correct Answer: C
Rationale: The left atrium is a thin-walled chamber that receives oxygenated blood from
the four pulmonary veins and sits superior and posterior to the thick-walled left
ventricle. The right atrium receives deoxygenated blood from the venae cavae and is
located on the opposite side of the heart. In echocardiography, the left atrium is often
assessed for enlargement because chronic pressure overload can cause it to dilate,
which is a marker of disease severity.
Question 4 of 70
A cardiovascular surgeon is preparing to replace a stenotic valve in a 65-year-old
patient. The valve in question is located between the left ventricle and the aorta, and its
cusps are shaped like half-moons without chordae tendineae attachments. During
ventricular diastole, the backflow of blood from the aorta causes these cusps to snap
shut. Which valve is being replaced?
A. The tricuspid valve
B. The mitral valve
C. The pulmonary valve
D. The aortic semilunar valve
Correct Answer: D
Rationale: The aortic semilunar valve is located at the junction of the left ventricle and
ascending aorta and consists of three pocket-like cusps that close passively when
aortic pressure exceeds ventricular pressure during diastole. Unlike atrioventricular
valves, semilunar valves have no chordae tendineae or papillary muscle attachments.
, Aortic stenosis is one of the most common valvular lesions in elderly patients and often
presents with syncope, angina, and dyspnea.
Question 5 of 70
During a routine physical examination of a 45-year-old marathon runner, the physician
palpates a broad, flat area on the superior surface of the heart where the great vessels
attach. This region is oriented posteriorly and superiorly and serves as the anchor point
for the ascending aorta, pulmonary trunk, and venae cavae. Which anatomical region is
being palpated?
A. The apex
B. The base
C. The anterior interventricular sulcus
D. The coronary sulcus
Correct Answer: B
Rationale: The base of the heart is the broad, flat posterior surface where the great
vessels enter and exit, oriented opposite the apex. The coronary sulcus encircles the
heart and separates the atria from the ventricles, while the anterior interventricular
sulcus separates the ventricles on the anterior surface. Understanding the orientation of
the base is essential for interpreting chest radiographs and echocardiographic views.
Question 6 of 70
A 34-year-old pregnant woman at 28 weeks gestation presents with fatigue and
dyspnea. An echocardiogram reveals a patent foramen ovale with a right-to-left shunt.
Blood is passing from the right atrium directly into the left atrium through this opening
in the interatrial septum. In a normal adult heart, this passageway is obliterated and
represented by which structure?
A. The fossa ovalis
Cardiovascular System – The Heart Exam Actual Exam 2026/2027
with Detailed Rationales | Complete Exam-Style Questions | Graded
A+ Pass Guaranteed
Total Questions: 70 | Time: 90 min | Pass: 80%
TABLE OF CONTENTS
Section 1 | Heart Anatomy (Chambers, Valves, Great Vessels) | Q1 – Q14
Section 2 | Cardiac Muscle & Conduction System | Q15 – Q28
Section 3 | Cardiac Cycle & Electrical Events (ECG) | Q29 – Q42
Section 4 | Blood Flow, Hemodynamics, & Cardiac Output | Q43 – Q56
Section 5 | Regulation of Heart Function & Clinical Correlates | Q57 – Q70
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
══════════════════════════════════════
SECTION 1: HEART ANATOMY (CHAMBERS, VALVES, GREAT VESSELS) Q1 – Q14
══════════════════════════════════════
Question 1 of 70
A 58-year-old man arrives in the emergency department complaining of crushing chest
pain. During the physical exam, the physician places a stethoscope at the left fifth
intercostal space just medial to the midclavicular line and hears a harsh holosystolic
murmur. This auscultation point is directly over the apex of the heart, which is formed
primarily by which chamber?
A. The right atrium
B. The left atrium
C. The left ventricle
D. The right ventricle
Correct Answer: C
Rationale: The apex of the heart is formed almost entirely by the left ventricle, which is
the thickest and most muscular chamber because it must pump blood to the entire
,systemic circulation. The right ventricle forms most of the anterior surface of the heart
but contributes only slightly to the apex. In clinical practice, the apex beat is the point of
maximal impulse and is the standard location for assessing left ventricular function.
Question 2 of 70
During a cadaveric dissection in the anatomy lab, a first-year student is tracing the path
of blood from the superior vena cava into the heart. She notes that blood enters the
right atrium and must pass through a valve before entering the right ventricle. This valve
is characterized by having three cusps and being anchored by fibrous threads to
papillary muscles. Which valve is the student observing?
A. The bicuspid valve
B. The tricuspid valve
C. The aortic semilunar valve
D. The pulmonary semilunar valve
Correct Answer: B
Rationale: The tricuspid valve sits between the right atrium and right ventricle and has
three cusps anchored by chordae tendineae to papillary muscles, preventing backflow
during ventricular systole. The bicuspid valve is located on the left side and has only two
cusps, while semilunar valves lack chordae tendineae entirely. Students often confuse
the tricuspid and bicuspid valves because both are atrioventricular valves, but the side
of the heart and cusp number are the distinguishing features.
Question 3 of 70
A 72-year-old woman with chronic heart failure is undergoing an echocardiogram. The
sonographer identifies a thin-walled chamber located superior and slightly posterior to a
thick-walled chamber on the same side of the heart. The thin-walled chamber receives
oxygenated blood returning from the lungs via four separate vessels. Which chamber is
the sonographer describing?
,A. The right atrium
B. The right ventricle
C. The left atrium
D. The left ventricle
Correct Answer: C
Rationale: The left atrium is a thin-walled chamber that receives oxygenated blood from
the four pulmonary veins and sits superior and posterior to the thick-walled left
ventricle. The right atrium receives deoxygenated blood from the venae cavae and is
located on the opposite side of the heart. In echocardiography, the left atrium is often
assessed for enlargement because chronic pressure overload can cause it to dilate,
which is a marker of disease severity.
Question 4 of 70
A cardiovascular surgeon is preparing to replace a stenotic valve in a 65-year-old
patient. The valve in question is located between the left ventricle and the aorta, and its
cusps are shaped like half-moons without chordae tendineae attachments. During
ventricular diastole, the backflow of blood from the aorta causes these cusps to snap
shut. Which valve is being replaced?
A. The tricuspid valve
B. The mitral valve
C. The pulmonary valve
D. The aortic semilunar valve
Correct Answer: D
Rationale: The aortic semilunar valve is located at the junction of the left ventricle and
ascending aorta and consists of three pocket-like cusps that close passively when
aortic pressure exceeds ventricular pressure during diastole. Unlike atrioventricular
valves, semilunar valves have no chordae tendineae or papillary muscle attachments.
, Aortic stenosis is one of the most common valvular lesions in elderly patients and often
presents with syncope, angina, and dyspnea.
Question 5 of 70
During a routine physical examination of a 45-year-old marathon runner, the physician
palpates a broad, flat area on the superior surface of the heart where the great vessels
attach. This region is oriented posteriorly and superiorly and serves as the anchor point
for the ascending aorta, pulmonary trunk, and venae cavae. Which anatomical region is
being palpated?
A. The apex
B. The base
C. The anterior interventricular sulcus
D. The coronary sulcus
Correct Answer: B
Rationale: The base of the heart is the broad, flat posterior surface where the great
vessels enter and exit, oriented opposite the apex. The coronary sulcus encircles the
heart and separates the atria from the ventricles, while the anterior interventricular
sulcus separates the ventricles on the anterior surface. Understanding the orientation of
the base is essential for interpreting chest radiographs and echocardiographic views.
Question 6 of 70
A 34-year-old pregnant woman at 28 weeks gestation presents with fatigue and
dyspnea. An echocardiogram reveals a patent foramen ovale with a right-to-left shunt.
Blood is passing from the right atrium directly into the left atrium through this opening
in the interatrial septum. In a normal adult heart, this passageway is obliterated and
represented by which structure?
A. The fossa ovalis
