Lab Practicum: BIOS252 / BIOS 252 (Latest Update 2026/2027) Anato...
OBJECTIVE ASSESSMENT - EXAM
Lab Practicum: BIOS252 / BIOS
252 (Latest Update 2026/2027)
Anatomy & Physiology II with Lab
| Review Questions with Verified
Answers | 100% Correct | Grade A
- Chamberlain 2026/2027
75 100% 2026/2027 80%
QUESTIONS VERIFIED ANSWERS EDITION PASSING SCORE
TOPICS COVERED
• Cardiovascular System Anatomy • Endocrine System & Hormones
• Respiratory System & Gas Exchange • Reproductive Anatomy
• Digestive System & Metabolism • Fluid-Electrolyte Balance
• Renal Physiology & Filtration • Histology & Microscopy
• Acid-Base Balance • Physiology Lab Techniques
COVER PAGE - 1
,SECTION 1: Cardiovascular System Anatomy & Physiology Weight: 20%
Q1 A student in the BIOS252 lab is examining a preserved sheep heart and identifies a thick muscular wall
separating the left and right sides of the heart. What is the anatomical name of this structure, and what is
its primary physiological function?
A. The interatrial septum; it prevents mixing of oxygenated and deoxygenated blood between the atria.
B. The interventricular septum; it prevents mixing of oxygenated and deoxygenated blood between the ventricles.
C. The epicardium; it provides a protective outer layer for the heart.
D. The endocardium; it lines the chambers and prevents blood clot formation.
Correct Answer: B
Rationale: The interventricular septum is the thick muscular wall separating the left and right ventricles, ensuring complete
separation of oxygenated (left) and deoxygenated (right) blood. The interatrial septum separates the atria. The epicardium and
endocardium are layers of the heart wall, not septa.
Q2 During a laboratory dissection of the cardiovascular system, a student traces blood flow from the superior
vena cava through the heart to the aorta. What is the correct sequence of chambers and valves that blood
passes through during this pathway?
A. Right atrium → tricuspid valve → right ventricle → pulmonary valve → left atrium → mitral valve → left ventricle →
aortic valve → aorta.
B. Right atrium → tricuspid valve → right ventricle → pulmonary valve → pulmonary trunk → lungs → pulmonary veins
→ left atrium → mitral valve → left ventricle → aortic valve → aorta.
C. Left atrium → mitral valve → left ventricle → aortic valve → right atrium → tricuspid valve → right ventricle →
pulmonary valve → aorta.
D. Right atrium → mitral valve → right ventricle → pulmonary valve → left atrium → tricuspid valve → left ventricle →
aortic valve → aorta.
Correct Answer: B
Rationale: The correct pathway includes the pulmonary circulation (right heart → lungs → left heart). Blood flows: SVC → right
atrium → tricuspid → right ventricle → pulmonary valve → pulmonary trunk → lungs → pulmonary veins → left atrium → mitral →
left ventricle → aortic valve → aorta. Option A skips the lungs. Option C reverses the sequence. Option D has incorrect valve
Q3 A student is recording an electrocardiogram (ECG) in the physiology lab and observes a distinct wave
pattern on the monitor. Which ECG wave corresponds to ventricular depolarization, and what electrical
event does it represent?
A. The P wave; it represents atrial depolarization.
B. The QRS complex; it represents ventricular depolarization.
C. The T wave; it represents ventricular repolarization.
D. The PR interval; it represents the delay at the AV node.
Correct Answer: B
Rationale: The QRS complex represents ventricular depolarization, which triggers ventricular contraction. The P wave is atrial
depolarization. The T wave is ventricular repolarization. The PR interval includes atrial depolarization and AV nodal delay but is
not a wave.
Q4 In the cardiovascular physiology lab, a student measures blood pressure using a sphygmomanometer and
stethoscope on their lab partner. What specific vascular sound phenomenon is the student listening for
when determining systolic and diastolic pressures?
A. The closing sounds of the aortic and pulmonary valves.
B. The turbulent blood flow through a partially compressed artery creating Korotkoff sounds.
C. The venous hum from blood returning through the jugular veins.
D. The bruit caused by arterial plaque buildup.
Correct Answer: B
Rationale: Korotkoff sounds are created by turbulent blood flow through a partially compressed brachial artery as cuff pressure is
released. The first sound marks systolic pressure; the disappearance of sound marks diastolic. Valve sounds, venous hums, and
bruits are not used for routine BP measurement.
, Q5 A student is examining a microscopic slide of cardiac muscle tissue and notices structures that connect
individual cardiac muscle cells end-to-end. What are these specialized junctions called, and what is their
functional significance in cardiac muscle?
A. Neuromuscular junctions; they transmit nerve impulses to muscle fibers.
B. Intercalated discs; they contain gap junctions and desmosomes for electrical and mechanical coupling.
C. Tendons; they attach muscle to bone for force transmission.
D. Sarcomeres; they are the contractile units of muscle cells.
Correct Answer: B
Rationale: Intercalated discs are unique to cardiac muscle and contain gap junctions (for rapid electrical signal propagation) and
desmosomes (for strong mechanical adhesion). Neuromuscular junctions are nerve-muscle synapses. Tendons connect muscle
to bone. Sarcomeres are intracellular contractile units.
Q6 During a physiology experiment, a student measures cardiac output before and after their lab partner
performs vigorous exercise. Which physiological parameter increases most significantly during exercise to
account for the elevated cardiac output?
A. Stroke volume increases exclusively while heart rate remains constant.
B. Heart rate increases exclusively while stroke volume remains constant.
C. Both heart rate and stroke volume increase, with heart rate being the primary contributor.
D. Blood viscosity decreases, allowing more blood to flow without increased cardiac effort.
Correct Answer: C
Rationale: Cardiac output = heart rate × stroke volume. During exercise, both increase, but heart rate is the primary contributor to
the large increase in cardiac output. Stroke volume plateaus at higher intensities. Blood viscosity does not significantly decrease
during exercise.
Q7 A student is reviewing the histology of blood vessels and comparing the structure of arteries and veins
under the microscope. Which structural feature is most prominent in large arteries and allows them to
withstand high pressure and recoil between heartbeats?
A. A thick tunica media with abundant smooth muscle and elastic fibers.
B. A thin tunica intima with minimal endothelial lining.
C. Valves that prevent backflow of blood.
D. A large lumen with very thin walls relative to diameter.
Correct Answer: A
Rationale: Large arteries (elastic arteries) have a thick tunica media rich in elastic fibers and smooth muscle, allowing them to
stretch during systole and recoil during diastole (Windkessel effect). Veins have valves and thinner walls. All vessels have an
endothelial lining.
Q8 In the lab, a student is performing a blood typing experiment using anti-A, anti-B, and anti-Rh sera on a
blood sample. The blood sample shows agglutination with anti-A and anti-Rh sera but no agglutination with
anti-B serum. What is the blood type?
A. Type A positive.
B. Type A negative.
C. Type AB positive.
D. Type O positive.
Correct Answer: A
Rationale: Agglutination with anti-A indicates A antigens on RBCs (type A). Agglutination with anti-Rh indicates Rh factor
presence (positive). No agglutination with anti-B confirms no B antigens. Therefore, the blood type is A positive. Type AB would
agglutinate with both anti-A and anti-B. Type O would not agglutinate with anti-A or anti-B.
OBJECTIVE ASSESSMENT - EXAM
Lab Practicum: BIOS252 / BIOS
252 (Latest Update 2026/2027)
Anatomy & Physiology II with Lab
| Review Questions with Verified
Answers | 100% Correct | Grade A
- Chamberlain 2026/2027
75 100% 2026/2027 80%
QUESTIONS VERIFIED ANSWERS EDITION PASSING SCORE
TOPICS COVERED
• Cardiovascular System Anatomy • Endocrine System & Hormones
• Respiratory System & Gas Exchange • Reproductive Anatomy
• Digestive System & Metabolism • Fluid-Electrolyte Balance
• Renal Physiology & Filtration • Histology & Microscopy
• Acid-Base Balance • Physiology Lab Techniques
COVER PAGE - 1
,SECTION 1: Cardiovascular System Anatomy & Physiology Weight: 20%
Q1 A student in the BIOS252 lab is examining a preserved sheep heart and identifies a thick muscular wall
separating the left and right sides of the heart. What is the anatomical name of this structure, and what is
its primary physiological function?
A. The interatrial septum; it prevents mixing of oxygenated and deoxygenated blood between the atria.
B. The interventricular septum; it prevents mixing of oxygenated and deoxygenated blood between the ventricles.
C. The epicardium; it provides a protective outer layer for the heart.
D. The endocardium; it lines the chambers and prevents blood clot formation.
Correct Answer: B
Rationale: The interventricular septum is the thick muscular wall separating the left and right ventricles, ensuring complete
separation of oxygenated (left) and deoxygenated (right) blood. The interatrial septum separates the atria. The epicardium and
endocardium are layers of the heart wall, not septa.
Q2 During a laboratory dissection of the cardiovascular system, a student traces blood flow from the superior
vena cava through the heart to the aorta. What is the correct sequence of chambers and valves that blood
passes through during this pathway?
A. Right atrium → tricuspid valve → right ventricle → pulmonary valve → left atrium → mitral valve → left ventricle →
aortic valve → aorta.
B. Right atrium → tricuspid valve → right ventricle → pulmonary valve → pulmonary trunk → lungs → pulmonary veins
→ left atrium → mitral valve → left ventricle → aortic valve → aorta.
C. Left atrium → mitral valve → left ventricle → aortic valve → right atrium → tricuspid valve → right ventricle →
pulmonary valve → aorta.
D. Right atrium → mitral valve → right ventricle → pulmonary valve → left atrium → tricuspid valve → left ventricle →
aortic valve → aorta.
Correct Answer: B
Rationale: The correct pathway includes the pulmonary circulation (right heart → lungs → left heart). Blood flows: SVC → right
atrium → tricuspid → right ventricle → pulmonary valve → pulmonary trunk → lungs → pulmonary veins → left atrium → mitral →
left ventricle → aortic valve → aorta. Option A skips the lungs. Option C reverses the sequence. Option D has incorrect valve
Q3 A student is recording an electrocardiogram (ECG) in the physiology lab and observes a distinct wave
pattern on the monitor. Which ECG wave corresponds to ventricular depolarization, and what electrical
event does it represent?
A. The P wave; it represents atrial depolarization.
B. The QRS complex; it represents ventricular depolarization.
C. The T wave; it represents ventricular repolarization.
D. The PR interval; it represents the delay at the AV node.
Correct Answer: B
Rationale: The QRS complex represents ventricular depolarization, which triggers ventricular contraction. The P wave is atrial
depolarization. The T wave is ventricular repolarization. The PR interval includes atrial depolarization and AV nodal delay but is
not a wave.
Q4 In the cardiovascular physiology lab, a student measures blood pressure using a sphygmomanometer and
stethoscope on their lab partner. What specific vascular sound phenomenon is the student listening for
when determining systolic and diastolic pressures?
A. The closing sounds of the aortic and pulmonary valves.
B. The turbulent blood flow through a partially compressed artery creating Korotkoff sounds.
C. The venous hum from blood returning through the jugular veins.
D. The bruit caused by arterial plaque buildup.
Correct Answer: B
Rationale: Korotkoff sounds are created by turbulent blood flow through a partially compressed brachial artery as cuff pressure is
released. The first sound marks systolic pressure; the disappearance of sound marks diastolic. Valve sounds, venous hums, and
bruits are not used for routine BP measurement.
, Q5 A student is examining a microscopic slide of cardiac muscle tissue and notices structures that connect
individual cardiac muscle cells end-to-end. What are these specialized junctions called, and what is their
functional significance in cardiac muscle?
A. Neuromuscular junctions; they transmit nerve impulses to muscle fibers.
B. Intercalated discs; they contain gap junctions and desmosomes for electrical and mechanical coupling.
C. Tendons; they attach muscle to bone for force transmission.
D. Sarcomeres; they are the contractile units of muscle cells.
Correct Answer: B
Rationale: Intercalated discs are unique to cardiac muscle and contain gap junctions (for rapid electrical signal propagation) and
desmosomes (for strong mechanical adhesion). Neuromuscular junctions are nerve-muscle synapses. Tendons connect muscle
to bone. Sarcomeres are intracellular contractile units.
Q6 During a physiology experiment, a student measures cardiac output before and after their lab partner
performs vigorous exercise. Which physiological parameter increases most significantly during exercise to
account for the elevated cardiac output?
A. Stroke volume increases exclusively while heart rate remains constant.
B. Heart rate increases exclusively while stroke volume remains constant.
C. Both heart rate and stroke volume increase, with heart rate being the primary contributor.
D. Blood viscosity decreases, allowing more blood to flow without increased cardiac effort.
Correct Answer: C
Rationale: Cardiac output = heart rate × stroke volume. During exercise, both increase, but heart rate is the primary contributor to
the large increase in cardiac output. Stroke volume plateaus at higher intensities. Blood viscosity does not significantly decrease
during exercise.
Q7 A student is reviewing the histology of blood vessels and comparing the structure of arteries and veins
under the microscope. Which structural feature is most prominent in large arteries and allows them to
withstand high pressure and recoil between heartbeats?
A. A thick tunica media with abundant smooth muscle and elastic fibers.
B. A thin tunica intima with minimal endothelial lining.
C. Valves that prevent backflow of blood.
D. A large lumen with very thin walls relative to diameter.
Correct Answer: A
Rationale: Large arteries (elastic arteries) have a thick tunica media rich in elastic fibers and smooth muscle, allowing them to
stretch during systole and recoil during diastole (Windkessel effect). Veins have valves and thinner walls. All vessels have an
endothelial lining.
Q8 In the lab, a student is performing a blood typing experiment using anti-A, anti-B, and anti-Rh sera on a
blood sample. The blood sample shows agglutination with anti-A and anti-Rh sera but no agglutination with
anti-B serum. What is the blood type?
A. Type A positive.
B. Type A negative.
C. Type AB positive.
D. Type O positive.
Correct Answer: A
Rationale: Agglutination with anti-A indicates A antigens on RBCs (type A). Agglutination with anti-Rh indicates Rh factor
presence (positive). No agglutination with anti-B confirms no B antigens. Therefore, the blood type is A positive. Type AB would
agglutinate with both anti-A and anti-B. Type O would not agglutinate with anti-A or anti-B.
