A&P II Final Actual Exam 2026/2027 |
Verified Questions
Higher Education Biological Sciences Curriculum | Verified
Q&A | University-Level Anatomy and Physiology Students
This document contains 100 original questions developed to reinforce the official course objectives of a University-
Level Anatomy and Physiology II curriculum. The questions address the Cardiovascular and Lymphatic/Immune
Systems, Respiratory and Digestive Systems, Urinary System and Fluid, Electrolyte, and Acid-Base Balance, and
Reproductive Systems and Development. Content is designed to support academic success and actual exam
readiness for University-Level Anatomy and Physiology Students. All material is original and aligned with
foundational A&P textbooks (e.g., Marieb & Hoehn, Saladin) and current biological science educational standards
for the 2026/2027 cycle.
Domain: Cardiovascular and Lymphatic/Immune Systems
1. Which chamber of the heart receives oxygenated blood from the pulmonary veins?
A. Right atrium
B. Left atrium
C. Right ventricle
D. Left ventricle
Correct Answer: C
Rationale: The left atrium receives oxygenated blood returning from the lungs via the pulmonary veins.
2. What is the primary function of the atrioventricular (AV) valves?
A. Prevent backflow of blood from the ventricles into the atria during ventricular contraction
B. Prevent backflow from the atria into the veins
C. Control blood flow into the coronary arteries
D. Generate the electrical impulse for heart contraction
Correct Answer: D
Rationale: The AV valves (tricuspid and mitral) close during ventricular systole to prevent regurgitation into the atria.
3. Which blood vessel type is the primary site of gas and nutrient exchange with tissues?
A. Arteries
B. Arterioles
C. Capillaries
D. Veins
Correct Answer: C
Rationale: Capillaries have thin walls that permit diffusion of gases, nutrients, and wastes between blood and interstitial fluid.
4. What is the role of the sinoatrial (SA) node?
A. It serves as the primary pacemaker of the heart, initiating the electrical impulse for each heartbeat
B. It delays the impulse to allow atrial contraction to complete
C. It conducts the impulse through the interventricular septum
D. It prevents backflow into the atria
Correct Answer: D
Rationale: The SA node spontaneously depolarizes and sets the rhythm of the heart under normal conditions.
5. Which component of blood is primarily responsible for oxygen transport?
A. Plasma proteins
B. Leukocytes
A&P II Final Actual Exam 2026/2027 | Verified Questions
, C. Erythrocytes (containing hemoglobin)
D. Platelets
Correct Answer: B
Rationale: Erythrocytes contain hemoglobin, the iron-containing protein that binds and transports oxygen.
6. What is the function of lymph nodes in the immune system?
A. Filter lymph and provide sites for activation of lymphocytes
B. Produce all circulating erythrocytes
C. Store bile
D. Generate the heartbeat
Correct Answer: B
Rationale: Lymph nodes filter pathogens and debris from lymph and house lymphocytes that mount adaptive immune
responses.
7. Which antibody class is the most abundant in serum and can cross the placenta?
A. IgA
B. IgM
C. IgG
D. IgE
Correct Answer: A
Rationale: IgG is the predominant serum immunoglobulin and is the only class that crosses the placenta to provide passive
immunity to the fetus.
8. What is cardiac output?
A. The volume of blood ejected by each ventricle per minute (heart rate × stroke volume)
B. The volume of blood in the ventricles at the end of diastole
C. The pressure in the aorta during systole
D. The total blood volume of the body
Correct Answer: D
Rationale: Cardiac output is the product of heart rate and stroke volume and represents the blood flow delivered to the
systemic circulation.
9. Which cells are the primary producers of antibodies?
A. T helper cells
B. Cytotoxic T cells
C. Plasma cells (differentiated B cells)
D. Natural killer cells
Correct Answer: B
Rationale: Plasma cells are terminally differentiated B lymphocytes specialized for large-scale antibody secretion.
10. What is the primary function of the pulmonary circuit?
A. To carry deoxygenated blood to the lungs for gas exchange and return oxygenated blood to the left atrium
B. To deliver oxygenated blood to all body tissues
C. To filter blood through the kidneys
D. To transport lymph from tissues to the bloodstream
Correct Answer: A
Rationale: The pulmonary circuit moves blood between the heart and lungs for oxygenation.
11. Which leukocyte type is most abundant in normal circulating blood and is a primary responder
to bacterial infection?
A. Eosinophils
B. Basophils
C. Neutrophils
D. Monocytes
Correct Answer: D
Rationale: Neutrophils constitute the majority of circulating leukocytes and rapidly migrate to sites of acute bacterial
infection.
12. What is the Frank-Starling law of the heart?
A. Stroke volume increases as end-diastolic volume (preload) increases, within physiological limits
A&P II Final Actual Exam 2026/2027 | Verified Questions
, B. Heart rate is determined solely by the SA node
C. Blood pressure is independent of cardiac output
D. Venous return has no effect on cardiac performance
Correct Answer: D
Rationale: The Frank-Starling mechanism states that the heart pumps more forcefully when it is filled more completely.
13. Which structure returns lymph to the bloodstream at the junction of the left subclavian and
internal jugular veins?
A. Right lymphatic duct
B. Thoracic duct
C. Cisterna chyli only
D. Spleen
Correct Answer: A
Rationale: The thoracic duct is the main lymphatic vessel that drains most of the body and empties into the left venous angle.
14. What is the primary role of helper T (CD4+) cells?
A. To activate B cells and cytotoxic T cells through cytokine secretion and direct contact
B. To directly kill virus-infected cells by releasing perforin
C. To produce antibodies
D. To phagocytose bacteria
Correct Answer: D
Rationale: Helper T cells orchestrate adaptive immunity by stimulating both humoral and cell-mediated responses.
15. Which valve prevents backflow of blood from the aorta into the left ventricle?
A. Tricuspid valve
B. Mitral (bicuspid) valve
C. Pulmonary semilunar valve
D. Aortic semilunar valve
Correct Answer: D
Rationale: The aortic semilunar valve closes during ventricular diastole to prevent regurgitation from the aorta.
16. What is the function of the spleen in the immune and circulatory systems?
A. It filters blood, removes aged erythrocytes, and provides a site for immune responses to blood-borne
antigens
B. It produces all circulating plasma proteins
C. It stores bile and concentrates it
D. It generates action potentials for the heart
Correct Answer: B
Rationale: The spleen filters blood, recycles iron from old red cells, and supports adaptive immune responses.
17. Which factor most directly increases peripheral resistance and thereby elevates arterial blood
pressure?
A. Vasodilation of arterioles
B. Vasoconstriction of arterioles
C. Decreased blood viscosity
D. Increased vessel compliance
Correct Answer: C
Rationale: Arteriolar vasoconstriction raises resistance, which, for a given cardiac output, elevates mean arterial pressure.
18. What is passive immunity?
A. Immunity acquired by transfer of antibodies from another individual (e.g., maternal IgG or therapeutic
immunoglobulin)
B. Immunity resulting from active production of antibodies after antigen exposure
C. Immunity provided only by natural killer cells
D. Immunity that lasts a lifetime after a single vaccination
Correct Answer: A
Rationale: Passive immunity involves receipt of preformed antibodies rather than active immune response by the recipient.
19. Which wave of the ECG corresponds to ventricular depolarization?
A. P wave
A&P II Final Actual Exam 2026/2027 | Verified Questions
Verified Questions
Higher Education Biological Sciences Curriculum | Verified
Q&A | University-Level Anatomy and Physiology Students
This document contains 100 original questions developed to reinforce the official course objectives of a University-
Level Anatomy and Physiology II curriculum. The questions address the Cardiovascular and Lymphatic/Immune
Systems, Respiratory and Digestive Systems, Urinary System and Fluid, Electrolyte, and Acid-Base Balance, and
Reproductive Systems and Development. Content is designed to support academic success and actual exam
readiness for University-Level Anatomy and Physiology Students. All material is original and aligned with
foundational A&P textbooks (e.g., Marieb & Hoehn, Saladin) and current biological science educational standards
for the 2026/2027 cycle.
Domain: Cardiovascular and Lymphatic/Immune Systems
1. Which chamber of the heart receives oxygenated blood from the pulmonary veins?
A. Right atrium
B. Left atrium
C. Right ventricle
D. Left ventricle
Correct Answer: C
Rationale: The left atrium receives oxygenated blood returning from the lungs via the pulmonary veins.
2. What is the primary function of the atrioventricular (AV) valves?
A. Prevent backflow of blood from the ventricles into the atria during ventricular contraction
B. Prevent backflow from the atria into the veins
C. Control blood flow into the coronary arteries
D. Generate the electrical impulse for heart contraction
Correct Answer: D
Rationale: The AV valves (tricuspid and mitral) close during ventricular systole to prevent regurgitation into the atria.
3. Which blood vessel type is the primary site of gas and nutrient exchange with tissues?
A. Arteries
B. Arterioles
C. Capillaries
D. Veins
Correct Answer: C
Rationale: Capillaries have thin walls that permit diffusion of gases, nutrients, and wastes between blood and interstitial fluid.
4. What is the role of the sinoatrial (SA) node?
A. It serves as the primary pacemaker of the heart, initiating the electrical impulse for each heartbeat
B. It delays the impulse to allow atrial contraction to complete
C. It conducts the impulse through the interventricular septum
D. It prevents backflow into the atria
Correct Answer: D
Rationale: The SA node spontaneously depolarizes and sets the rhythm of the heart under normal conditions.
5. Which component of blood is primarily responsible for oxygen transport?
A. Plasma proteins
B. Leukocytes
A&P II Final Actual Exam 2026/2027 | Verified Questions
, C. Erythrocytes (containing hemoglobin)
D. Platelets
Correct Answer: B
Rationale: Erythrocytes contain hemoglobin, the iron-containing protein that binds and transports oxygen.
6. What is the function of lymph nodes in the immune system?
A. Filter lymph and provide sites for activation of lymphocytes
B. Produce all circulating erythrocytes
C. Store bile
D. Generate the heartbeat
Correct Answer: B
Rationale: Lymph nodes filter pathogens and debris from lymph and house lymphocytes that mount adaptive immune
responses.
7. Which antibody class is the most abundant in serum and can cross the placenta?
A. IgA
B. IgM
C. IgG
D. IgE
Correct Answer: A
Rationale: IgG is the predominant serum immunoglobulin and is the only class that crosses the placenta to provide passive
immunity to the fetus.
8. What is cardiac output?
A. The volume of blood ejected by each ventricle per minute (heart rate × stroke volume)
B. The volume of blood in the ventricles at the end of diastole
C. The pressure in the aorta during systole
D. The total blood volume of the body
Correct Answer: D
Rationale: Cardiac output is the product of heart rate and stroke volume and represents the blood flow delivered to the
systemic circulation.
9. Which cells are the primary producers of antibodies?
A. T helper cells
B. Cytotoxic T cells
C. Plasma cells (differentiated B cells)
D. Natural killer cells
Correct Answer: B
Rationale: Plasma cells are terminally differentiated B lymphocytes specialized for large-scale antibody secretion.
10. What is the primary function of the pulmonary circuit?
A. To carry deoxygenated blood to the lungs for gas exchange and return oxygenated blood to the left atrium
B. To deliver oxygenated blood to all body tissues
C. To filter blood through the kidneys
D. To transport lymph from tissues to the bloodstream
Correct Answer: A
Rationale: The pulmonary circuit moves blood between the heart and lungs for oxygenation.
11. Which leukocyte type is most abundant in normal circulating blood and is a primary responder
to bacterial infection?
A. Eosinophils
B. Basophils
C. Neutrophils
D. Monocytes
Correct Answer: D
Rationale: Neutrophils constitute the majority of circulating leukocytes and rapidly migrate to sites of acute bacterial
infection.
12. What is the Frank-Starling law of the heart?
A. Stroke volume increases as end-diastolic volume (preload) increases, within physiological limits
A&P II Final Actual Exam 2026/2027 | Verified Questions
, B. Heart rate is determined solely by the SA node
C. Blood pressure is independent of cardiac output
D. Venous return has no effect on cardiac performance
Correct Answer: D
Rationale: The Frank-Starling mechanism states that the heart pumps more forcefully when it is filled more completely.
13. Which structure returns lymph to the bloodstream at the junction of the left subclavian and
internal jugular veins?
A. Right lymphatic duct
B. Thoracic duct
C. Cisterna chyli only
D. Spleen
Correct Answer: A
Rationale: The thoracic duct is the main lymphatic vessel that drains most of the body and empties into the left venous angle.
14. What is the primary role of helper T (CD4+) cells?
A. To activate B cells and cytotoxic T cells through cytokine secretion and direct contact
B. To directly kill virus-infected cells by releasing perforin
C. To produce antibodies
D. To phagocytose bacteria
Correct Answer: D
Rationale: Helper T cells orchestrate adaptive immunity by stimulating both humoral and cell-mediated responses.
15. Which valve prevents backflow of blood from the aorta into the left ventricle?
A. Tricuspid valve
B. Mitral (bicuspid) valve
C. Pulmonary semilunar valve
D. Aortic semilunar valve
Correct Answer: D
Rationale: The aortic semilunar valve closes during ventricular diastole to prevent regurgitation from the aorta.
16. What is the function of the spleen in the immune and circulatory systems?
A. It filters blood, removes aged erythrocytes, and provides a site for immune responses to blood-borne
antigens
B. It produces all circulating plasma proteins
C. It stores bile and concentrates it
D. It generates action potentials for the heart
Correct Answer: B
Rationale: The spleen filters blood, recycles iron from old red cells, and supports adaptive immune responses.
17. Which factor most directly increases peripheral resistance and thereby elevates arterial blood
pressure?
A. Vasodilation of arterioles
B. Vasoconstriction of arterioles
C. Decreased blood viscosity
D. Increased vessel compliance
Correct Answer: C
Rationale: Arteriolar vasoconstriction raises resistance, which, for a given cardiac output, elevates mean arterial pressure.
18. What is passive immunity?
A. Immunity acquired by transfer of antibodies from another individual (e.g., maternal IgG or therapeutic
immunoglobulin)
B. Immunity resulting from active production of antibodies after antigen exposure
C. Immunity provided only by natural killer cells
D. Immunity that lasts a lifetime after a single vaccination
Correct Answer: A
Rationale: Passive immunity involves receipt of preformed antibodies rather than active immune response by the recipient.
19. Which wave of the ECG corresponds to ventricular depolarization?
A. P wave
A&P II Final Actual Exam 2026/2027 | Verified Questions
