1|Page
BIOS 252/ BIOS252 | Questions and correct
Answers (Latest 2026/ 2027 Update) Anatomy and
Physiology II with Lab Review | Grade A| 100%
Correct (Accurate) -Chamberlain
Major Topics Covered
Cardiovascular Physiology
Blood & Hematology
Respiratory System
Digestive System
Endocrine System
Urinary/Renal Physiology
Reproductive System
Immunity & Lymphatics
Acid-Base Balance
Fluid & Electrolyte Regulation
Clinical Applications & Lab Concepts
Blood & Hematology
Question 1
Which chamber of the heart generates the highest pressure during
contraction?
A. Right atrium
pg. 1
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B. Left atrium
C. Right ventricle
D. Left ventricle
Answer: D. Left ventricle
Rationale: The left ventricle pumps blood through the systemic
circulation, requiring significantly higher pressure than the right
ventricle, which pumps only to the lungs.
Question 2
The tricuspid valve is located between the:
A. Left atrium and left ventricle
B. Right atrium and right ventricle
C. Left ventricle and aorta
D. Right ventricle and pulmonary trunk
Answer: B. Right atrium and right ventricle
Rationale: The tricuspid valve is the right atrioventricular valve and
prevents backflow into the right atrium during ventricular contraction.
Question 3
The first heart sound (S1) is caused by:
pg. 2
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A. Closure of semilunar valves
B. Opening of AV valves
C. Closure of AV valves
D. Opening of semilunar valves
Answer: C. Closure of AV valves
Rationale: S1 ("lub") occurs when the mitral and tricuspid valves close
at the beginning of ventricular systole.
Question 4
The coronary arteries originate from the:
A. Pulmonary trunk
B. Right ventricle
C. Ascending aorta
D. Superior vena cava
Answer: C. Ascending aorta
Rationale: Coronary arteries arise just above the aortic valve and
supply oxygenated blood to the myocardium.
Question 5
Which ECG wave represents ventricular depolarization?
pg. 3
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A. P wave
B. QRS complex
C. T wave
D. U wave
Answer: B. QRS complex
Rationale: The QRS complex reflects rapid depolarization of the
ventricles preceding contraction.
Question 6
Cardiac output equals:
A. Heart rate × Stroke volume
B. Blood pressure × Resistance
C. Stroke volume ÷ Heart rate
D. Resistance × Venous return
Answer: A. Heart rate × Stroke volume
Rationale: Cardiac output is the volume of blood pumped per minute
and is calculated by multiplying heart rate by stroke volume.
Question 7
The primary pacemaker of the heart is the:
pg. 4
BIOS 252/ BIOS252 | Questions and correct
Answers (Latest 2026/ 2027 Update) Anatomy and
Physiology II with Lab Review | Grade A| 100%
Correct (Accurate) -Chamberlain
Major Topics Covered
Cardiovascular Physiology
Blood & Hematology
Respiratory System
Digestive System
Endocrine System
Urinary/Renal Physiology
Reproductive System
Immunity & Lymphatics
Acid-Base Balance
Fluid & Electrolyte Regulation
Clinical Applications & Lab Concepts
Blood & Hematology
Question 1
Which chamber of the heart generates the highest pressure during
contraction?
A. Right atrium
pg. 1
,2|Page
B. Left atrium
C. Right ventricle
D. Left ventricle
Answer: D. Left ventricle
Rationale: The left ventricle pumps blood through the systemic
circulation, requiring significantly higher pressure than the right
ventricle, which pumps only to the lungs.
Question 2
The tricuspid valve is located between the:
A. Left atrium and left ventricle
B. Right atrium and right ventricle
C. Left ventricle and aorta
D. Right ventricle and pulmonary trunk
Answer: B. Right atrium and right ventricle
Rationale: The tricuspid valve is the right atrioventricular valve and
prevents backflow into the right atrium during ventricular contraction.
Question 3
The first heart sound (S1) is caused by:
pg. 2
,3|Page
A. Closure of semilunar valves
B. Opening of AV valves
C. Closure of AV valves
D. Opening of semilunar valves
Answer: C. Closure of AV valves
Rationale: S1 ("lub") occurs when the mitral and tricuspid valves close
at the beginning of ventricular systole.
Question 4
The coronary arteries originate from the:
A. Pulmonary trunk
B. Right ventricle
C. Ascending aorta
D. Superior vena cava
Answer: C. Ascending aorta
Rationale: Coronary arteries arise just above the aortic valve and
supply oxygenated blood to the myocardium.
Question 5
Which ECG wave represents ventricular depolarization?
pg. 3
, 4|Page
A. P wave
B. QRS complex
C. T wave
D. U wave
Answer: B. QRS complex
Rationale: The QRS complex reflects rapid depolarization of the
ventricles preceding contraction.
Question 6
Cardiac output equals:
A. Heart rate × Stroke volume
B. Blood pressure × Resistance
C. Stroke volume ÷ Heart rate
D. Resistance × Venous return
Answer: A. Heart rate × Stroke volume
Rationale: Cardiac output is the volume of blood pumped per minute
and is calculated by multiplying heart rate by stroke volume.
Question 7
The primary pacemaker of the heart is the:
pg. 4
