A&P II LAB MEGA REVIEW 2026
BIO S252 Complete Practicum Prep •
Questions 1–100 • High-Yield Diagrams • Lab ID
Guide
I. BLOOD – LAB PRACTICAL REVISION
1.
Which formed element is most numerous in a normal blood smear?
A. Platelets
B. Neutrophils
C. Erythrocytes
D. Monocytes
Answer: C — Erythrocytes
Rationale: RBCs make up ~99% of all formed elements and dominate the
smear.
2.
A blood sample showing elevated eosinophils suggests which
condition?
A. Viral infection
B. Parasitic infection or allergy
C. Bacterial infection
D. Chronic inflammation
, Answer: B
Rationale: Eosinophils increase in parasite infections and allergic
reactions.
3.
Which blood type is the universal donor?
A. O+
B. O−
C. AB+
D. A−
Answer: B
Rationale: O− has no A/B antigens and no Rh antigen.
4.
What is the function of fibrin in blood?
A. Immune defense
B. Oxygen transport
C. Clot formation
D. pH buffering
Answer: C
II. CARDIOVASCULAR – LAB MODELS, VESSELS, PHYSIOLOGY
5.
,The SA node is located in:
A. Left ventricle
B. Right atrium
C. Interventricular septum
D. Aortic arch
Answer: B
Rationale: The SA node sits at the superior right atrium near the SVC
opening.
6.
Which vessel carries oxygen-poor blood?
A. Pulmonary vein
B. Aorta
C. Pulmonary artery
D. Coronary artery
Answer: C
Rationale: The pulmonary artery carries deoxygenated blood to the lungs.
7.
On a heart model, the structure separating ventricles on the anterior
surface is:
A. Coronary sulcus
B. Anterior interventricular sulcus
C. Auricle
D. Fossa ovalis
, Answer: B
8.
What does the QRS complex represent?
A. Atrial contraction
B. Atrial repolarization
C. Ventricular depolarization
D. Ventricular repolarization
Answer: C
9.
Pulse is most commonly taken at which artery?
A. Femoral
B. Radial
C. Popliteal
D. Carotid
Answer: B
III. RESPIRATORY SYSTEM – MODELS, PHYSIOLOGY
10.
The epiglottis functions to:
A. Warm air
BIO S252 Complete Practicum Prep •
Questions 1–100 • High-Yield Diagrams • Lab ID
Guide
I. BLOOD – LAB PRACTICAL REVISION
1.
Which formed element is most numerous in a normal blood smear?
A. Platelets
B. Neutrophils
C. Erythrocytes
D. Monocytes
Answer: C — Erythrocytes
Rationale: RBCs make up ~99% of all formed elements and dominate the
smear.
2.
A blood sample showing elevated eosinophils suggests which
condition?
A. Viral infection
B. Parasitic infection or allergy
C. Bacterial infection
D. Chronic inflammation
, Answer: B
Rationale: Eosinophils increase in parasite infections and allergic
reactions.
3.
Which blood type is the universal donor?
A. O+
B. O−
C. AB+
D. A−
Answer: B
Rationale: O− has no A/B antigens and no Rh antigen.
4.
What is the function of fibrin in blood?
A. Immune defense
B. Oxygen transport
C. Clot formation
D. pH buffering
Answer: C
II. CARDIOVASCULAR – LAB MODELS, VESSELS, PHYSIOLOGY
5.
,The SA node is located in:
A. Left ventricle
B. Right atrium
C. Interventricular septum
D. Aortic arch
Answer: B
Rationale: The SA node sits at the superior right atrium near the SVC
opening.
6.
Which vessel carries oxygen-poor blood?
A. Pulmonary vein
B. Aorta
C. Pulmonary artery
D. Coronary artery
Answer: C
Rationale: The pulmonary artery carries deoxygenated blood to the lungs.
7.
On a heart model, the structure separating ventricles on the anterior
surface is:
A. Coronary sulcus
B. Anterior interventricular sulcus
C. Auricle
D. Fossa ovalis
, Answer: B
8.
What does the QRS complex represent?
A. Atrial contraction
B. Atrial repolarization
C. Ventricular depolarization
D. Ventricular repolarization
Answer: C
9.
Pulse is most commonly taken at which artery?
A. Femoral
B. Radial
C. Popliteal
D. Carotid
Answer: B
III. RESPIRATORY SYSTEM – MODELS, PHYSIOLOGY
10.
The epiglottis functions to:
A. Warm air
