Anatomy & Physiology II Exam 2 Actual
2026/2027 – 100% Verified | Detailed Rationales
Pass Guaranteed – A+ Graded
Content Area Overview
This actual examination reflects the foundational anatomical and physiological knowledge required for
success on Anatomy & Physiology II Exam 2. It is designed to evaluate the student's understanding of
blood flow, capillary dynamics, lymphatic structure and function, immune responses, and respiratory
mechanics. Questions are structured to assess recall of system components, application of physiological
principles to clinical scenarios, and analysis of homeostatic regulation. This authentic question bank
represents the real exams used in the course and serves as a comprehensive resource for students
demonstrating mastery of cardiovascular, lymphatic, immune, and respiratory content.
SECTION 1: Cardiovascular Physiology – Blood Flow & Capillary Dynamics
Questions 1–25
Q1. Which of the following factors would most significantly increase resistance to blood flow in a vessel?
A. Doubling the vessel length
B. Doubling the vessel radius
C. Decreasing blood viscosity
D. Decreasing cardiac output
Rationale: The best answer is A. Resistance to blood flow is governed by Poiseuille's law, where
resistance is directly proportional to vessel length and blood viscosity, but inversely proportional to the
fourth power of the vessel radius. This means radius has the most dramatic effect—halving the radius
increases resistance 16-fold. Doubling length only doubles resistance. Decreasing viscosity or cardiac
output would actually decrease resistance or the pressure gradient needed, respectively. The radius rule
is what makes vasoconstriction and vasodilation such powerful regulators of blood flow.
Correct Answer: A
,Q2. A patient has a systolic blood pressure of 140 mmHg and a diastolic pressure of 90 mmHg. What is
this patient's pulse pressure?
A. 50 mmHg
B. 60 mmHg
C. 70 mmHg
D. 230 mmHg
Rationale: The best answer is A. Pulse pressure is calculated simply as systolic pressure minus diastolic
pressure: 140 − 90 = 50 mmHg. It represents the pressure generated by the stroke volume and the
elasticity of the large arteries. A normal pulse pressure is about 30–50 mmHg. Widened pulse pressure
(greater than 60 mmHg) can indicate aortic regurgitation or arteriosclerosis, while narrowed pulse
pressure suggests decreased stroke volume or increased peripheral resistance. Students sometimes
mistakenly add the two pressures or confuse pulse pressure with mean arterial pressure.
Correct Answer: A
Q3. A 68-year-old male with atherosclerosis has stiffened arteries that cannot expand and recoil
normally during the cardiac cycle. Which hemodynamic change would you expect?
A. Decreased systolic pressure and increased diastolic pressure
B. Increased systolic pressure, decreased diastolic pressure, and widened pulse pressure
C. No change in blood pressure
D. Decreased mean arterial pressure only
Rationale: The best answer is B. In healthy arteries, the elastic walls stretch during systole to absorb
some of the pressure, then recoil during diastole to maintain forward flow. When arteries stiffen due to
atherosclerosis, they can't stretch during systole, so systolic pressure rises. They also can't recoil
effectively during diastole, so diastolic pressure falls. The result is a widened pulse pressure, which is a
hallmark of arteriosclerosis and a risk factor for cardiovascular events. This is why isolated systolic
hypertension is common in the elderly.
Correct Answer: B
Q4. A student nurse is calculating Mean Arterial Pressure (MAP) for a patient with a blood pressure of
120/80 mmHg. What is the correct MAP?
A. 93 mmHg
B. 100 mmHg
C. 106 mmHg
D. 200 mmHg
,Rationale: The best answer is A. MAP is calculated as diastolic pressure plus one-third of the pulse
pressure, or equivalently: (2 × diastolic + systolic) / 3. For 120/80: (2 × 80 + 120) / 3 = (160 + 120) / 3 =
= 93.3 mmHg. MAP represents the average pressure driving blood through the systemic
circulation and is a better indicator of tissue perfusion than either systolic or diastolic pressure alone.
The formula weights diastole more heavily because the heart spends about twice as long in diastole as in
systole at normal resting heart rates.
Correct Answer: A
Q5. At the arterial end of a capillary, the net filtration pressure favors movement of fluid:
A. Into the capillary
B. Out of the capillary into the interstitial space
C. Neither into nor out of the capillary
D. Back and forth equally
Rationale: The best answer is B. At the arterial end of a capillary, hydrostatic blood pressure (about 35
mmHg) is greater than the combined forces opposing filtration—interstitial fluid hydrostatic pressure
and blood colloid osmotic (oncotic) pressure. The net filtration pressure is positive, pushing fluid and
small solutes out of the capillary into the interstitial space. This is how nutrients and oxygen reach the
tissues. At the venous end, the balance shifts and reabsorption predominates. Understanding this
dynamic exchange is fundamental to understanding edema, shock, and fluid therapy.
Correct Answer: B
Q6. A patient with liver cirrhosis has decreased synthesis of plasma proteins, particularly albumin.
Which capillary exchange abnormality would most likely result?
A. Increased reabsorption at the venous end of capillaries
B. Decreased filtration at the arterial end
C. Edema due to decreased colloid osmotic pressure and reduced fluid return to capillaries
D. Increased blood viscosity and improved perfusion
Rationale: The best answer is C. Albumin is the primary protein responsible for plasma colloid osmotic
pressure (oncotic pressure), which draws fluid back into capillaries at the venous end. When albumin
levels drop, as in cirrhosis, nephrotic syndrome, or protein malnutrition, oncotic pressure decreases.
Less fluid is reabsorbed, more remains in the interstitial space, and edema develops. This is particularly
noticeable in dependent areas like the ankles and in abdominal ascites. The other options describe
opposite or unrelated effects—decreased albumin would not increase reabsorption or decrease
filtration, and it certainly doesn't improve perfusion.
, Correct Answer: C
Q7. Which Starling force is the main force promoting filtration of fluid out of capillaries at the arterial
end?
A. Interstitial fluid colloid osmotic pressure
B. Blood colloid osmotic pressure
C. Capillary hydrostatic pressure
D. Interstitial fluid hydrostatic pressure
Rationale: The best answer is C. Capillary hydrostatic pressure (blood pressure within the capillary) is
the main force pushing fluid and solutes out of the capillary at the arterial end. It is typically about 30–
35 mmHg at the arterial end and drops to about 15 mmHg at the venous end. Blood colloid osmotic
pressure (about 25 mmHg) opposes filtration and promotes reabsorption. Interstitial fluid hydrostatic
pressure is usually near zero or slightly negative, opposing filtration weakly. Interstitial colloid osmotic
pressure is very low in healthy tissue and promotes filtration only minimally.
Correct Answer: C
Q8. A patient presents with severe edema in the lower extremities. Laboratory analysis reveals normal
albumin levels but elevated venous pressure. Which condition best explains this presentation?
A. Decreased capillary hydrostatic pressure
B. Right-sided heart failure causing increased venous pressure and capillary hydrostatic pressure
C. Decreased interstitial fluid hydrostatic pressure
D. Lymphatic obstruction
Rationale: The best answer is B. Right-sided heart failure causes blood to back up in the systemic venous
circulation, increasing venous pressure. This elevated venous pressure is transmitted to the capillaries,
raising capillary hydrostatic pressure throughout the length of the capillary. The increased hydrostatic
pressure promotes excessive filtration and overwhelms the normal reabsorptive capacity, leading to
dependent edema. This is why right heart failure causes ankle and sacral edema, hepatomegaly, and
ascites. Normal albumin rules out low oncotic pressure as the primary cause, and lymphatic obstruction
would typically present differently.
Correct Answer: B
Q9. Net Filtration Pressure (NFP) at the arterial end of a capillary is calculated using which combination
of Starling forces?
2026/2027 – 100% Verified | Detailed Rationales
Pass Guaranteed – A+ Graded
Content Area Overview
This actual examination reflects the foundational anatomical and physiological knowledge required for
success on Anatomy & Physiology II Exam 2. It is designed to evaluate the student's understanding of
blood flow, capillary dynamics, lymphatic structure and function, immune responses, and respiratory
mechanics. Questions are structured to assess recall of system components, application of physiological
principles to clinical scenarios, and analysis of homeostatic regulation. This authentic question bank
represents the real exams used in the course and serves as a comprehensive resource for students
demonstrating mastery of cardiovascular, lymphatic, immune, and respiratory content.
SECTION 1: Cardiovascular Physiology – Blood Flow & Capillary Dynamics
Questions 1–25
Q1. Which of the following factors would most significantly increase resistance to blood flow in a vessel?
A. Doubling the vessel length
B. Doubling the vessel radius
C. Decreasing blood viscosity
D. Decreasing cardiac output
Rationale: The best answer is A. Resistance to blood flow is governed by Poiseuille's law, where
resistance is directly proportional to vessel length and blood viscosity, but inversely proportional to the
fourth power of the vessel radius. This means radius has the most dramatic effect—halving the radius
increases resistance 16-fold. Doubling length only doubles resistance. Decreasing viscosity or cardiac
output would actually decrease resistance or the pressure gradient needed, respectively. The radius rule
is what makes vasoconstriction and vasodilation such powerful regulators of blood flow.
Correct Answer: A
,Q2. A patient has a systolic blood pressure of 140 mmHg and a diastolic pressure of 90 mmHg. What is
this patient's pulse pressure?
A. 50 mmHg
B. 60 mmHg
C. 70 mmHg
D. 230 mmHg
Rationale: The best answer is A. Pulse pressure is calculated simply as systolic pressure minus diastolic
pressure: 140 − 90 = 50 mmHg. It represents the pressure generated by the stroke volume and the
elasticity of the large arteries. A normal pulse pressure is about 30–50 mmHg. Widened pulse pressure
(greater than 60 mmHg) can indicate aortic regurgitation or arteriosclerosis, while narrowed pulse
pressure suggests decreased stroke volume or increased peripheral resistance. Students sometimes
mistakenly add the two pressures or confuse pulse pressure with mean arterial pressure.
Correct Answer: A
Q3. A 68-year-old male with atherosclerosis has stiffened arteries that cannot expand and recoil
normally during the cardiac cycle. Which hemodynamic change would you expect?
A. Decreased systolic pressure and increased diastolic pressure
B. Increased systolic pressure, decreased diastolic pressure, and widened pulse pressure
C. No change in blood pressure
D. Decreased mean arterial pressure only
Rationale: The best answer is B. In healthy arteries, the elastic walls stretch during systole to absorb
some of the pressure, then recoil during diastole to maintain forward flow. When arteries stiffen due to
atherosclerosis, they can't stretch during systole, so systolic pressure rises. They also can't recoil
effectively during diastole, so diastolic pressure falls. The result is a widened pulse pressure, which is a
hallmark of arteriosclerosis and a risk factor for cardiovascular events. This is why isolated systolic
hypertension is common in the elderly.
Correct Answer: B
Q4. A student nurse is calculating Mean Arterial Pressure (MAP) for a patient with a blood pressure of
120/80 mmHg. What is the correct MAP?
A. 93 mmHg
B. 100 mmHg
C. 106 mmHg
D. 200 mmHg
,Rationale: The best answer is A. MAP is calculated as diastolic pressure plus one-third of the pulse
pressure, or equivalently: (2 × diastolic + systolic) / 3. For 120/80: (2 × 80 + 120) / 3 = (160 + 120) / 3 =
= 93.3 mmHg. MAP represents the average pressure driving blood through the systemic
circulation and is a better indicator of tissue perfusion than either systolic or diastolic pressure alone.
The formula weights diastole more heavily because the heart spends about twice as long in diastole as in
systole at normal resting heart rates.
Correct Answer: A
Q5. At the arterial end of a capillary, the net filtration pressure favors movement of fluid:
A. Into the capillary
B. Out of the capillary into the interstitial space
C. Neither into nor out of the capillary
D. Back and forth equally
Rationale: The best answer is B. At the arterial end of a capillary, hydrostatic blood pressure (about 35
mmHg) is greater than the combined forces opposing filtration—interstitial fluid hydrostatic pressure
and blood colloid osmotic (oncotic) pressure. The net filtration pressure is positive, pushing fluid and
small solutes out of the capillary into the interstitial space. This is how nutrients and oxygen reach the
tissues. At the venous end, the balance shifts and reabsorption predominates. Understanding this
dynamic exchange is fundamental to understanding edema, shock, and fluid therapy.
Correct Answer: B
Q6. A patient with liver cirrhosis has decreased synthesis of plasma proteins, particularly albumin.
Which capillary exchange abnormality would most likely result?
A. Increased reabsorption at the venous end of capillaries
B. Decreased filtration at the arterial end
C. Edema due to decreased colloid osmotic pressure and reduced fluid return to capillaries
D. Increased blood viscosity and improved perfusion
Rationale: The best answer is C. Albumin is the primary protein responsible for plasma colloid osmotic
pressure (oncotic pressure), which draws fluid back into capillaries at the venous end. When albumin
levels drop, as in cirrhosis, nephrotic syndrome, or protein malnutrition, oncotic pressure decreases.
Less fluid is reabsorbed, more remains in the interstitial space, and edema develops. This is particularly
noticeable in dependent areas like the ankles and in abdominal ascites. The other options describe
opposite or unrelated effects—decreased albumin would not increase reabsorption or decrease
filtration, and it certainly doesn't improve perfusion.
, Correct Answer: C
Q7. Which Starling force is the main force promoting filtration of fluid out of capillaries at the arterial
end?
A. Interstitial fluid colloid osmotic pressure
B. Blood colloid osmotic pressure
C. Capillary hydrostatic pressure
D. Interstitial fluid hydrostatic pressure
Rationale: The best answer is C. Capillary hydrostatic pressure (blood pressure within the capillary) is
the main force pushing fluid and solutes out of the capillary at the arterial end. It is typically about 30–
35 mmHg at the arterial end and drops to about 15 mmHg at the venous end. Blood colloid osmotic
pressure (about 25 mmHg) opposes filtration and promotes reabsorption. Interstitial fluid hydrostatic
pressure is usually near zero or slightly negative, opposing filtration weakly. Interstitial colloid osmotic
pressure is very low in healthy tissue and promotes filtration only minimally.
Correct Answer: C
Q8. A patient presents with severe edema in the lower extremities. Laboratory analysis reveals normal
albumin levels but elevated venous pressure. Which condition best explains this presentation?
A. Decreased capillary hydrostatic pressure
B. Right-sided heart failure causing increased venous pressure and capillary hydrostatic pressure
C. Decreased interstitial fluid hydrostatic pressure
D. Lymphatic obstruction
Rationale: The best answer is B. Right-sided heart failure causes blood to back up in the systemic venous
circulation, increasing venous pressure. This elevated venous pressure is transmitted to the capillaries,
raising capillary hydrostatic pressure throughout the length of the capillary. The increased hydrostatic
pressure promotes excessive filtration and overwhelms the normal reabsorptive capacity, leading to
dependent edema. This is why right heart failure causes ankle and sacral edema, hepatomegaly, and
ascites. Normal albumin rules out low oncotic pressure as the primary cause, and lymphatic obstruction
would typically present differently.
Correct Answer: B
Q9. Net Filtration Pressure (NFP) at the arterial end of a capillary is calculated using which combination
of Starling forces?
