BIOD 152 Module 4 Exam – Portage Learning Actual Exam
2026/2027: Complete Exam-Style Questions with Detailed Rationales
| 100% Verified | Pass Guaranteed – A+ Graded
TABLE OF CONTENTS
Section 1 | Cardiovascular System Anatomy and Physiology | Q1 – Q10
Section 2 | Blood and Hemodynamics | Q11 – Q20
Section 3 | Lymphatic and Immune Systems | Q21 – Q30
Section 4 | Respiratory System Anatomy and Function | Q31 – Q40
Section 5 | Integrated Case Studies and Clinical Correlation | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
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SECTION 1: CARDIOVASCULAR SYSTEM ANATOMY AND PHYSIOLOGY Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 67-year-old male is brought to the emergency department complaining of crushing
chest pain radiating to his left arm. An ECG reveals ST-segment elevation in leads V1
through V4. The cardiologist explains that a specific coronary artery is occluded. Which
coronary artery is most likely affected?
A. The right coronary artery
B. The left circumflex artery
C. The left anterior descending artery ✓ CORRECT
D. The posterior descending artery
Correct Answer: C
Rationale: ST-segment elevation in leads V1 through V4 indicates an anterior wall
myocardial infarction, which is supplied by the left anterior descending artery. Option B,
the left circumflex artery, typically affects the lateral wall and would show changes in
leads I, aVL, V5, and V6. Rapid identification of the affected coronary territory guides
,emergency reperfusion decisions and predicts complications like heart failure or
ventricular arrhythmias.
Question 2 of 50
A 24-year-old nursing student is reviewing cardiac anatomy and notices that the right
atrium receives blood from three major vessels. During a clinical rotation, she observes
a patient with a patent foramen ovale. Through which fetal structure does blood
normally shunt from the right atrium to the left atrium before birth?
A. The ductus arteriosus
B. The ductus venosus
C. The foramen ovale ✓ CORRECT
D. The fossa ovalis
Correct Answer: C
Rationale: The foramen ovale is the interatrial opening that allows oxygenated blood
from the inferior vena cava to bypass the pulmonary circulation and enter the left atrium
during fetal development. Option A, the ductus arteriosus, connects the pulmonary
artery to the aorta and bypasses the lungs at the great vessel level, not between the
atria. Understanding fetal circulation is essential for recognizing congenital heart
defects and predicting transitional changes in newborns.
Question 3 of 50
A 55-year-old male with a history of hypertension presents with progressive dyspnea on
exertion, orthopnea, and bilateral ankle edema. On physical exam, the nurse practitioner
notes a displaced apical impulse, an S3 gallop, and jugular venous distension. An
echocardiogram is ordered. Which chamber is most likely enlarged in this patient?
A. The left atrium only
B. The right ventricle only
C. The left ventricle ✓ CORRECT
,D. The right atrium only
Correct Answer: C
Rationale: Chronic pressure overload from hypertension causes concentric or eccentric
left ventricular hypertrophy and eventual dilation, producing the displaced apical
impulse, S3 gallop, and symptoms of left-sided heart failure. Option B, right ventricular
enlargement, typically results from pulmonary hypertension or left-sided failure but
would not explain the isolated left-sided findings initially. Echocardiographic
assessment of chamber dimensions and ejection fraction is fundamental for classifying
heart failure and guiding medical therapy.
Question 4 of 50
A 31-year-old marathon runner collapses during a race and is found to have no pulse.
Bystanders initiate CPR while awaiting paramedics. During chest compressions, which
heart valve is directly compressed against the vertebral column, creating the pressure
gradient that generates systemic blood flow?
A. The mitral valve
B. The tricuspid valve
C. The aortic valve ✓ CORRECT
D. The pulmonary valve
Correct Answer: C
Rationale: During closed-chest compressions, the left ventricle is compressed between
the sternum and spine, forcing blood through the aortic valve into the systemic
circulation to maintain coronary and cerebral perfusion. Option A, the mitral valve, is an
atrioventricular valve that closes during systole and is not the outflow valve compressed
during compressions. Understanding the mechanics of CPR helps healthcare providers
appreciate why adequate compression depth and rate are critical for generating
meaningful cardiac output.
, Question 5 of 50
A 48-year-old female presents with palpitations, fatigue, and mild chest discomfort. Her
ECG shows an irregularly irregular rhythm with no discernible P waves and narrow QRS
complexes. Her heart rate is 142 beats per minute. Which cardiac structure is
generating the disorganized electrical activity driving this arrhythmia?
A. The sinoatrial node
B. The atrioventricular node
C. Multiple ectopic foci within the atria ✓ CORRECT
D. The bundle of His
Correct Answer: C
Rationale: Atrial fibrillation arises from chaotic, rapid electrical discharges originating
from multiple ectopic sites within the atria, particularly the pulmonary vein ostia, rather
than the organized sinoatrial node pacemaker activity. Option A describes normal sinus
rhythm, which produces regular P waves before each QRS complex. Recognizing the
pathophysiology of atrial fibrillation explains why treatments target rate control, rhythm
control, or pulmonary vein isolation rather than simply suppressing the AV node.
Question 6 of 50
A 62-year-old male undergoes cardiac catheterization after an abnormal stress test. The
interventional cardiologist injects contrast dye into the ostium of a coronary artery that
arises from the left aortic sinus and courses along the atrioventricular groove. Which
artery is being cannulated?
A. The left anterior descending artery
B. The left circumflex artery ✓ CORRECT
C. The right coronary artery
D. The posterior interventricular artery
Correct Answer: B
2026/2027: Complete Exam-Style Questions with Detailed Rationales
| 100% Verified | Pass Guaranteed – A+ Graded
TABLE OF CONTENTS
Section 1 | Cardiovascular System Anatomy and Physiology | Q1 – Q10
Section 2 | Blood and Hemodynamics | Q11 – Q20
Section 3 | Lymphatic and Immune Systems | Q21 – Q30
Section 4 | Respiratory System Anatomy and Function | Q31 – Q40
Section 5 | Integrated Case Studies and Clinical Correlation | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
══════════════════════════════════════
SECTION 1: CARDIOVASCULAR SYSTEM ANATOMY AND PHYSIOLOGY Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 67-year-old male is brought to the emergency department complaining of crushing
chest pain radiating to his left arm. An ECG reveals ST-segment elevation in leads V1
through V4. The cardiologist explains that a specific coronary artery is occluded. Which
coronary artery is most likely affected?
A. The right coronary artery
B. The left circumflex artery
C. The left anterior descending artery ✓ CORRECT
D. The posterior descending artery
Correct Answer: C
Rationale: ST-segment elevation in leads V1 through V4 indicates an anterior wall
myocardial infarction, which is supplied by the left anterior descending artery. Option B,
the left circumflex artery, typically affects the lateral wall and would show changes in
leads I, aVL, V5, and V6. Rapid identification of the affected coronary territory guides
,emergency reperfusion decisions and predicts complications like heart failure or
ventricular arrhythmias.
Question 2 of 50
A 24-year-old nursing student is reviewing cardiac anatomy and notices that the right
atrium receives blood from three major vessels. During a clinical rotation, she observes
a patient with a patent foramen ovale. Through which fetal structure does blood
normally shunt from the right atrium to the left atrium before birth?
A. The ductus arteriosus
B. The ductus venosus
C. The foramen ovale ✓ CORRECT
D. The fossa ovalis
Correct Answer: C
Rationale: The foramen ovale is the interatrial opening that allows oxygenated blood
from the inferior vena cava to bypass the pulmonary circulation and enter the left atrium
during fetal development. Option A, the ductus arteriosus, connects the pulmonary
artery to the aorta and bypasses the lungs at the great vessel level, not between the
atria. Understanding fetal circulation is essential for recognizing congenital heart
defects and predicting transitional changes in newborns.
Question 3 of 50
A 55-year-old male with a history of hypertension presents with progressive dyspnea on
exertion, orthopnea, and bilateral ankle edema. On physical exam, the nurse practitioner
notes a displaced apical impulse, an S3 gallop, and jugular venous distension. An
echocardiogram is ordered. Which chamber is most likely enlarged in this patient?
A. The left atrium only
B. The right ventricle only
C. The left ventricle ✓ CORRECT
,D. The right atrium only
Correct Answer: C
Rationale: Chronic pressure overload from hypertension causes concentric or eccentric
left ventricular hypertrophy and eventual dilation, producing the displaced apical
impulse, S3 gallop, and symptoms of left-sided heart failure. Option B, right ventricular
enlargement, typically results from pulmonary hypertension or left-sided failure but
would not explain the isolated left-sided findings initially. Echocardiographic
assessment of chamber dimensions and ejection fraction is fundamental for classifying
heart failure and guiding medical therapy.
Question 4 of 50
A 31-year-old marathon runner collapses during a race and is found to have no pulse.
Bystanders initiate CPR while awaiting paramedics. During chest compressions, which
heart valve is directly compressed against the vertebral column, creating the pressure
gradient that generates systemic blood flow?
A. The mitral valve
B. The tricuspid valve
C. The aortic valve ✓ CORRECT
D. The pulmonary valve
Correct Answer: C
Rationale: During closed-chest compressions, the left ventricle is compressed between
the sternum and spine, forcing blood through the aortic valve into the systemic
circulation to maintain coronary and cerebral perfusion. Option A, the mitral valve, is an
atrioventricular valve that closes during systole and is not the outflow valve compressed
during compressions. Understanding the mechanics of CPR helps healthcare providers
appreciate why adequate compression depth and rate are critical for generating
meaningful cardiac output.
, Question 5 of 50
A 48-year-old female presents with palpitations, fatigue, and mild chest discomfort. Her
ECG shows an irregularly irregular rhythm with no discernible P waves and narrow QRS
complexes. Her heart rate is 142 beats per minute. Which cardiac structure is
generating the disorganized electrical activity driving this arrhythmia?
A. The sinoatrial node
B. The atrioventricular node
C. Multiple ectopic foci within the atria ✓ CORRECT
D. The bundle of His
Correct Answer: C
Rationale: Atrial fibrillation arises from chaotic, rapid electrical discharges originating
from multiple ectopic sites within the atria, particularly the pulmonary vein ostia, rather
than the organized sinoatrial node pacemaker activity. Option A describes normal sinus
rhythm, which produces regular P waves before each QRS complex. Recognizing the
pathophysiology of atrial fibrillation explains why treatments target rate control, rhythm
control, or pulmonary vein isolation rather than simply suppressing the AV node.
Question 6 of 50
A 62-year-old male undergoes cardiac catheterization after an abnormal stress test. The
interventional cardiologist injects contrast dye into the ostium of a coronary artery that
arises from the left aortic sinus and courses along the atrioventricular groove. Which
artery is being cannulated?
A. The left anterior descending artery
B. The left circumflex artery ✓ CORRECT
C. The right coronary artery
D. The posterior interventricular artery
Correct Answer: B
