PORTAGE LEARNING | BIOD 152
Essential Human Anatomy & Physiology II with Lab
Module 4 Examination
Comprehensive Examination Preparation | 2026-2027 Edition
TOTAL QUESTIONS TIME ALLOTTED TOTAL POINTS SECTIONS
100 120 Minutes 100 6
DIRECTIONS: Each of the 100 questions or incomplete statements is followed by four options (A-D). Select the ONE best
answer; the verified answer and a rationale are provided beneath every item. Approximately 70 percent of items are
scenario-based and 30 percent are direct recall or anatomical identification; cognitive levels span recall, application, and
analysis. Portage Learning-style items mirror the actual Module 4 exam format and difficulty, including lab-based
identification questions that link structure with physiological function and clinical case studies that integrate the circulatory,
blood, lymphatic, endocrine, and genetic systems.
SECTION 1: THE CIRCULATORY SYSTEM
Heart Anatomy, Blood Flow, and Major Vessels | Questions 1-35
Q1: Which heart chamber receives oxygenated blood returning from the lungs through the pulmonary veins?
A. Right atrium
B. Right ventricle
C. Left atrium [CORRECT]
D. Left ventricle
Correct Answer: C
Rationale: The left atrium is the receiving chamber for the four pulmonary veins, which deliver oxygenated blood
from the lungs. Blood then crosses the mitral (bicuspid) valve into the left ventricle for systemic distribution. The
right atrium and right ventricle instead handle deoxygenated blood returning from the systemic circuit, so options
A, B, and D describe chambers of the pulmonary-return side.
1
,BIOD 152 Module 4 Exam - Portage Learning 2026-2027 Edition
Q2: The mitral (bicuspid) valve is located between which two cardiac structures?
A. Right atrium and right ventricle
B. Left atrium and left ventricle [CORRECT]
C. Left ventricle and the aorta
D. Right ventricle and the pulmonary trunk
Correct Answer: B
Rationale: The mitral valve sits between the left atrium and left ventricle and prevents backflow into the atrium
during ventricular systole. The right atrium-right ventricle junction contains the tricuspid valve, the left
ventricle-aorta junction contains the aortic semilunar valve, and the right ventricle-pulmonary trunk junction
contains the pulmonary semilunar valve. Confusing these four valve locations is a classic Module 4 error.
Q3: During a cardiac catheterization, contrast dye is injected into the right atrium and immediately passes
through the tricuspid valve. Into which chamber does the dye next enter?
A. Right ventricle [CORRECT]
B. Left atrium
C. Pulmonary trunk
D. Left ventricle
Correct Answer: A
Rationale: The tricuspid valve is the atrioventricular valve of the right side of the heart, so blood flowing through
it enters the right ventricle directly. The left chambers are reached only after the blood has circulated through the
lungs, and the pulmonary trunk is entered from the right ventricle through the pulmonary semilunar valve, not
from the atrium.
Q4: During ventricular diastole, the pulmonary semilunar valve closes to prevent the backflow of blood into
which chamber?
A. Left atrium
B. Right atrium
C. Left ventricle
D. Right ventricle [CORRECT]
Correct Answer: D
Rationale: The pulmonary semilunar valve lies between the right ventricle and the pulmonary trunk; when
ventricular pressure falls below pulmonary trunk pressure, it snaps shut to keep ejected blood from re-entering the
right ventricle. The aortic semilunar valve performs the same role on the left side, while the AV valves (mitral and
tricuspid) guard the atria rather than the great vessels.
2
,BIOD 152 Module 4 Exam - Portage Learning 2026-2027 Edition
Q5: During open-heart surgery, a surgeon observes blood entering the right atrium through the coronary
sinus. This blood has drained directly from:
A. The pulmonary circulation
B. The great vessels of the head and neck
C. The myocardium of the heart itself [CORRECT]
D. The lower limbs and abdominal organs
Correct Answer: C
Rationale: The coronary sinus collects deoxygenated blood from the cardiac veins that drain the myocardium and
empties it into the right atrium. The superior vena cava drains the head, neck, and upper limbs, and the inferior
vena cava drains the lower body, so those venae cavae are incorrect. The pulmonary circulation returns to the left
atrium, not the coronary sinus.
Q6: The layer of the serous pericardium that adheres directly to the surface of the heart muscle is the:
A. Parietal pericardium
B. Visceral pericardium (epicardium) [CORRECT]
C. Myocardium
D. Endocardium
Correct Answer: B
Rationale: The visceral pericardium (epicardium) is the serous layer intimately attached to the myocardial
surface, while the parietal pericardium lines the fibrous pericardial sac; the slit-like pericardial cavity lies between
them. The myocardium and endocardium are layers of the heart wall itself, not portions of the serous pericardium,
which makes C and D classification errors.
Q7: During ventricular systole, the chordae tendineae and their papillary muscles function to:
A. Prevent eversion (prolapse) of the AV valve leaflets into the atria [CORRECT]
B. Open the semilunar valves to begin ejection
C. Contract the atrial walls to complete ventricular filling
D. Conduct electrical impulses across the ventricular myocardium
Correct Answer: A
Rationale: As ventricular pressure rises, the papillary muscles contract and tension the chordae tendineae,
anchoring the mitral and tricuspid leaflets so they cannot blow back into the atria. Semilunar valve opening is
driven by pressure gradients alone, atrial contraction is produced by atrial myocardium, and impulse conduction is
the job of the Purkinje fiber network.
3
, BIOD 152 Module 4 Exam - Portage Learning 2026-2027 Edition
Q8: The wall of the left ventricle is approximately three times thicker than the wall of the right ventricle
because the left ventricle:
A. Receives a larger volume of blood during each cardiac cycle
B. Pumps blood through the short, low-resistance pulmonary circuit
C. Stores blood at low pressure during diastole
D. Must generate greater pressure to perfuse the entire high-resistance systemic circuit [CORRECT]
Correct Answer: D
Rationale: Both ventricles eject the same stroke volume (about 70 mL), so the difference is pressure, not volume.
Systemic vascular resistance is far higher than pulmonary resistance, requiring left ventricular systolic pressures of
roughly 120 mmHg versus only about 25 mmHg in the right ventricle. Option B describes the right ventricle, and C
is irrelevant to wall thickness.
Q9: Which sequence correctly traces oxygenated blood from its arrival from the lungs into the systemic
circulation?
A. Pulmonary trunk -> left atrium -> mitral valve -> left ventricle -> aortic valve
B. Pulmonary veins -> right atrium -> tricuspid valve -> right ventricle -> aortic valve
C. Pulmonary veins -> left atrium -> mitral valve -> left ventricle -> aortic valve -> aorta [CORRECT]
D. Pulmonary veins -> left atrium -> tricuspid valve -> left ventricle -> aortic valve
Correct Answer: C
Rationale: Oxygenated blood enters the left atrium through the pulmonary veins, crosses the mitral valve into the
left ventricle, and is ejected through the aortic semilunar valve into the aorta. The pulmonary trunk carries
deoxygenated blood away from the heart, the tricuspid valve is on the right side only, and no route passes from the
left atrium to the right atrium.
Q10: The sinoatrial (SA) node, the normal pacemaker of the heart, is located in the:
A. Wall of the right atrium near the entrance of the superior vena cava [CORRECT]
B. Interventricular septum between the ventricles
C. Wall of the left atrium near the pulmonary vein openings
D. Apex of the left ventricle
Correct Answer: A
Rationale: The SA node sits in the upper wall of the right atrium adjacent to the SVC opening and initiates each
heartbeat at 70-80 beats per minute. The AV node lies in the interatrial septum, the bundle branches run down the
interventricular septum, and Purkinje fibers spread through the ventricular walls - none of these is the atrial
pacemaker site.
4
Essential Human Anatomy & Physiology II with Lab
Module 4 Examination
Comprehensive Examination Preparation | 2026-2027 Edition
TOTAL QUESTIONS TIME ALLOTTED TOTAL POINTS SECTIONS
100 120 Minutes 100 6
DIRECTIONS: Each of the 100 questions or incomplete statements is followed by four options (A-D). Select the ONE best
answer; the verified answer and a rationale are provided beneath every item. Approximately 70 percent of items are
scenario-based and 30 percent are direct recall or anatomical identification; cognitive levels span recall, application, and
analysis. Portage Learning-style items mirror the actual Module 4 exam format and difficulty, including lab-based
identification questions that link structure with physiological function and clinical case studies that integrate the circulatory,
blood, lymphatic, endocrine, and genetic systems.
SECTION 1: THE CIRCULATORY SYSTEM
Heart Anatomy, Blood Flow, and Major Vessels | Questions 1-35
Q1: Which heart chamber receives oxygenated blood returning from the lungs through the pulmonary veins?
A. Right atrium
B. Right ventricle
C. Left atrium [CORRECT]
D. Left ventricle
Correct Answer: C
Rationale: The left atrium is the receiving chamber for the four pulmonary veins, which deliver oxygenated blood
from the lungs. Blood then crosses the mitral (bicuspid) valve into the left ventricle for systemic distribution. The
right atrium and right ventricle instead handle deoxygenated blood returning from the systemic circuit, so options
A, B, and D describe chambers of the pulmonary-return side.
1
,BIOD 152 Module 4 Exam - Portage Learning 2026-2027 Edition
Q2: The mitral (bicuspid) valve is located between which two cardiac structures?
A. Right atrium and right ventricle
B. Left atrium and left ventricle [CORRECT]
C. Left ventricle and the aorta
D. Right ventricle and the pulmonary trunk
Correct Answer: B
Rationale: The mitral valve sits between the left atrium and left ventricle and prevents backflow into the atrium
during ventricular systole. The right atrium-right ventricle junction contains the tricuspid valve, the left
ventricle-aorta junction contains the aortic semilunar valve, and the right ventricle-pulmonary trunk junction
contains the pulmonary semilunar valve. Confusing these four valve locations is a classic Module 4 error.
Q3: During a cardiac catheterization, contrast dye is injected into the right atrium and immediately passes
through the tricuspid valve. Into which chamber does the dye next enter?
A. Right ventricle [CORRECT]
B. Left atrium
C. Pulmonary trunk
D. Left ventricle
Correct Answer: A
Rationale: The tricuspid valve is the atrioventricular valve of the right side of the heart, so blood flowing through
it enters the right ventricle directly. The left chambers are reached only after the blood has circulated through the
lungs, and the pulmonary trunk is entered from the right ventricle through the pulmonary semilunar valve, not
from the atrium.
Q4: During ventricular diastole, the pulmonary semilunar valve closes to prevent the backflow of blood into
which chamber?
A. Left atrium
B. Right atrium
C. Left ventricle
D. Right ventricle [CORRECT]
Correct Answer: D
Rationale: The pulmonary semilunar valve lies between the right ventricle and the pulmonary trunk; when
ventricular pressure falls below pulmonary trunk pressure, it snaps shut to keep ejected blood from re-entering the
right ventricle. The aortic semilunar valve performs the same role on the left side, while the AV valves (mitral and
tricuspid) guard the atria rather than the great vessels.
2
,BIOD 152 Module 4 Exam - Portage Learning 2026-2027 Edition
Q5: During open-heart surgery, a surgeon observes blood entering the right atrium through the coronary
sinus. This blood has drained directly from:
A. The pulmonary circulation
B. The great vessels of the head and neck
C. The myocardium of the heart itself [CORRECT]
D. The lower limbs and abdominal organs
Correct Answer: C
Rationale: The coronary sinus collects deoxygenated blood from the cardiac veins that drain the myocardium and
empties it into the right atrium. The superior vena cava drains the head, neck, and upper limbs, and the inferior
vena cava drains the lower body, so those venae cavae are incorrect. The pulmonary circulation returns to the left
atrium, not the coronary sinus.
Q6: The layer of the serous pericardium that adheres directly to the surface of the heart muscle is the:
A. Parietal pericardium
B. Visceral pericardium (epicardium) [CORRECT]
C. Myocardium
D. Endocardium
Correct Answer: B
Rationale: The visceral pericardium (epicardium) is the serous layer intimately attached to the myocardial
surface, while the parietal pericardium lines the fibrous pericardial sac; the slit-like pericardial cavity lies between
them. The myocardium and endocardium are layers of the heart wall itself, not portions of the serous pericardium,
which makes C and D classification errors.
Q7: During ventricular systole, the chordae tendineae and their papillary muscles function to:
A. Prevent eversion (prolapse) of the AV valve leaflets into the atria [CORRECT]
B. Open the semilunar valves to begin ejection
C. Contract the atrial walls to complete ventricular filling
D. Conduct electrical impulses across the ventricular myocardium
Correct Answer: A
Rationale: As ventricular pressure rises, the papillary muscles contract and tension the chordae tendineae,
anchoring the mitral and tricuspid leaflets so they cannot blow back into the atria. Semilunar valve opening is
driven by pressure gradients alone, atrial contraction is produced by atrial myocardium, and impulse conduction is
the job of the Purkinje fiber network.
3
, BIOD 152 Module 4 Exam - Portage Learning 2026-2027 Edition
Q8: The wall of the left ventricle is approximately three times thicker than the wall of the right ventricle
because the left ventricle:
A. Receives a larger volume of blood during each cardiac cycle
B. Pumps blood through the short, low-resistance pulmonary circuit
C. Stores blood at low pressure during diastole
D. Must generate greater pressure to perfuse the entire high-resistance systemic circuit [CORRECT]
Correct Answer: D
Rationale: Both ventricles eject the same stroke volume (about 70 mL), so the difference is pressure, not volume.
Systemic vascular resistance is far higher than pulmonary resistance, requiring left ventricular systolic pressures of
roughly 120 mmHg versus only about 25 mmHg in the right ventricle. Option B describes the right ventricle, and C
is irrelevant to wall thickness.
Q9: Which sequence correctly traces oxygenated blood from its arrival from the lungs into the systemic
circulation?
A. Pulmonary trunk -> left atrium -> mitral valve -> left ventricle -> aortic valve
B. Pulmonary veins -> right atrium -> tricuspid valve -> right ventricle -> aortic valve
C. Pulmonary veins -> left atrium -> mitral valve -> left ventricle -> aortic valve -> aorta [CORRECT]
D. Pulmonary veins -> left atrium -> tricuspid valve -> left ventricle -> aortic valve
Correct Answer: C
Rationale: Oxygenated blood enters the left atrium through the pulmonary veins, crosses the mitral valve into the
left ventricle, and is ejected through the aortic semilunar valve into the aorta. The pulmonary trunk carries
deoxygenated blood away from the heart, the tricuspid valve is on the right side only, and no route passes from the
left atrium to the right atrium.
Q10: The sinoatrial (SA) node, the normal pacemaker of the heart, is located in the:
A. Wall of the right atrium near the entrance of the superior vena cava [CORRECT]
B. Interventricular septum between the ventricles
C. Wall of the left atrium near the pulmonary vein openings
D. Apex of the left ventricle
Correct Answer: A
Rationale: The SA node sits in the upper wall of the right atrium adjacent to the SVC opening and initiates each
heartbeat at 70-80 beats per minute. The AV node lies in the interatrial septum, the bundle branches run down the
interventricular septum, and Purkinje fibers spread through the ventricular walls - none of these is the atrial
pacemaker site.
4
