NR567 Final Exam Study Guide | Latest Update
2026 | Diagnosis & Management in Psychiatric-
Mental Health Across the Lifespan II
Comprehensive Exam with Verified Answers &
Detailed Rationales | Graded A+
1. Preload is best defined as:
• A) The resistance the left ventricle must overcome to circulate blood
• B) The volume of blood in the ventricles at the end of diastole,
representing the degree of myocardial fiber stretch
• C) The pressure generated by the left ventricle during systole
• D) The force of myocardial contraction independent of fiber length
Rationale: Preload is the volume of blood in the ventricles at the end of diastole,
which stretches the myocardial fibers and determines the degree of fiber stretch
before contraction. It is directly related to venous return and filling pressures.
2. Afterload is best defined as:
• A) The volume of blood returning to the heart
• B) The resistance the left ventricle must overcome to eject blood into the
systemic circulation
• C) The pressure in the pulmonary artery
• D) The end-diastolic volume of the right ventricle
Rationale: Afterload is the resistance against which the heart must pump blood,
represented by aortic impedance and systemic vascular resistance. Increased
afterload increases cardiac workload and oxygen demand.
3. The Frank-Starling law of the heart states that:
, • A) The stroke volume of the left ventricle increases as left ventricular
volume increases due to myocyte stretch causing a more forceful systolic
contraction
• B) The heart rate increases in response to increased venous return
• C) Cardiac output decreases as filling pressure increases
• D) Myocardial contractility is independent of fiber length
Rationale: The Frank-Starling law describes the relationship between stroke
volume and end-diastolic volume. As more blood enters the ventricle, cardiac
muscle fibers stretch, leading to a more forceful contraction and increased stroke
volume.
4. Which of the following conditions increases afterload?
• A) Hypertension
• B) Hypovolemia
• C) Decreased systemic vascular resistance
• D) Vasodilation
Rationale: Afterload increases in conditions such as hypertension and
vasoconstriction. Increased afterload increases cardiac workload and myocardial
oxygen demand.
5. A patient with heart failure has a left ventricular filling pressure of 22 mm
Hg. This is most consistent with:
• A) Normal cardiac function
• B) Pulmonary congestion
• C) Decreased preload
• D) Reduced afterload
Rationale: Preloads greater than 20-25 mm Hg result in pulmonary congestion.
Normal filling pressures are typically less than 15 mm Hg. Elevated filling
pressures indicate volume overload and impaired cardiac function.
,6. According to the Frank-Starling mechanism, which of the following occurs
when venous return increases?
• A) Decreased stroke volume
• B) Increased stroke volume due to increased myocardial fiber stretch
• C) Decreased cardiac output
• D) Decreased force of contraction
Rationale: According to the Frank-Starling mechanism, increased venous return
leads to increased ventricular filling (preload), which stretches myocardial fibers
and results in a more forceful contraction, increasing stroke volume.
7. The physiological importance of the Frank-Starling mechanism lies
primarily in:
• A) Maintaining equality between left and right ventricular output
• B) Decreasing cardiac output during exercise
• C) Increasing systemic vascular resistance
• D) Reducing myocardial oxygen demand
Rationale: The Frank-Starling mechanism is important for maintaining left and
right ventricular output equality, allowing the heart to match cardiac output with
venous return without depending on external regulation.
8. Which medication class reduces both preload and afterload in heart
failure?
• A) Beta-blockers
• B) Digoxin
• C) ACE inhibitors and ARBs
• D) Calcium channel blockers
, Rationale: ACE inhibitors and ARBs reduce both preload (through venodilation)
and afterload (through arteriodilation), decreasing the workload on the failing
myocardium. They also block the renin-angiotensin-aldosterone system.
9. Increased afterload results in:
• A) Decreased cardiac workload
• B) Increased cardiac workload and increased myocardial oxygen
demand
• C) Decreased systemic vascular resistance
• D) Decreased blood pressure
Rationale: Increased afterload (resistance) requires the heart to work harder to
eject blood, increasing cardiac workload and myocardial oxygen demand. This can
exacerbate heart failure and ischemia.
10. The ascending limb of the left ventricular function curve (filling pressure
less than 15 mm Hg) represents:
• A) A plateau where stroke volume is independent of filling pressure
• B) The classic Frank-Starling relationship where increased preload
increases stroke volume
• C) A decline in cardiac function
• D) Pulmonary edema
Rationale: The ascending limb of the left ventricular function curve (<15 mm Hg
filling pressure) represents the classic Frank-Starling relationship, where increased
left ventricular filling pressure (preload) leads to increased stroke volume.
11. Which of the following medications reduces preload by redistributing
blood away from the chest into peripheral veins?
• A) ACE inhibitors
• B) ARBs
2026 | Diagnosis & Management in Psychiatric-
Mental Health Across the Lifespan II
Comprehensive Exam with Verified Answers &
Detailed Rationales | Graded A+
1. Preload is best defined as:
• A) The resistance the left ventricle must overcome to circulate blood
• B) The volume of blood in the ventricles at the end of diastole,
representing the degree of myocardial fiber stretch
• C) The pressure generated by the left ventricle during systole
• D) The force of myocardial contraction independent of fiber length
Rationale: Preload is the volume of blood in the ventricles at the end of diastole,
which stretches the myocardial fibers and determines the degree of fiber stretch
before contraction. It is directly related to venous return and filling pressures.
2. Afterload is best defined as:
• A) The volume of blood returning to the heart
• B) The resistance the left ventricle must overcome to eject blood into the
systemic circulation
• C) The pressure in the pulmonary artery
• D) The end-diastolic volume of the right ventricle
Rationale: Afterload is the resistance against which the heart must pump blood,
represented by aortic impedance and systemic vascular resistance. Increased
afterload increases cardiac workload and oxygen demand.
3. The Frank-Starling law of the heart states that:
, • A) The stroke volume of the left ventricle increases as left ventricular
volume increases due to myocyte stretch causing a more forceful systolic
contraction
• B) The heart rate increases in response to increased venous return
• C) Cardiac output decreases as filling pressure increases
• D) Myocardial contractility is independent of fiber length
Rationale: The Frank-Starling law describes the relationship between stroke
volume and end-diastolic volume. As more blood enters the ventricle, cardiac
muscle fibers stretch, leading to a more forceful contraction and increased stroke
volume.
4. Which of the following conditions increases afterload?
• A) Hypertension
• B) Hypovolemia
• C) Decreased systemic vascular resistance
• D) Vasodilation
Rationale: Afterload increases in conditions such as hypertension and
vasoconstriction. Increased afterload increases cardiac workload and myocardial
oxygen demand.
5. A patient with heart failure has a left ventricular filling pressure of 22 mm
Hg. This is most consistent with:
• A) Normal cardiac function
• B) Pulmonary congestion
• C) Decreased preload
• D) Reduced afterload
Rationale: Preloads greater than 20-25 mm Hg result in pulmonary congestion.
Normal filling pressures are typically less than 15 mm Hg. Elevated filling
pressures indicate volume overload and impaired cardiac function.
,6. According to the Frank-Starling mechanism, which of the following occurs
when venous return increases?
• A) Decreased stroke volume
• B) Increased stroke volume due to increased myocardial fiber stretch
• C) Decreased cardiac output
• D) Decreased force of contraction
Rationale: According to the Frank-Starling mechanism, increased venous return
leads to increased ventricular filling (preload), which stretches myocardial fibers
and results in a more forceful contraction, increasing stroke volume.
7. The physiological importance of the Frank-Starling mechanism lies
primarily in:
• A) Maintaining equality between left and right ventricular output
• B) Decreasing cardiac output during exercise
• C) Increasing systemic vascular resistance
• D) Reducing myocardial oxygen demand
Rationale: The Frank-Starling mechanism is important for maintaining left and
right ventricular output equality, allowing the heart to match cardiac output with
venous return without depending on external regulation.
8. Which medication class reduces both preload and afterload in heart
failure?
• A) Beta-blockers
• B) Digoxin
• C) ACE inhibitors and ARBs
• D) Calcium channel blockers
, Rationale: ACE inhibitors and ARBs reduce both preload (through venodilation)
and afterload (through arteriodilation), decreasing the workload on the failing
myocardium. They also block the renin-angiotensin-aldosterone system.
9. Increased afterload results in:
• A) Decreased cardiac workload
• B) Increased cardiac workload and increased myocardial oxygen
demand
• C) Decreased systemic vascular resistance
• D) Decreased blood pressure
Rationale: Increased afterload (resistance) requires the heart to work harder to
eject blood, increasing cardiac workload and myocardial oxygen demand. This can
exacerbate heart failure and ischemia.
10. The ascending limb of the left ventricular function curve (filling pressure
less than 15 mm Hg) represents:
• A) A plateau where stroke volume is independent of filling pressure
• B) The classic Frank-Starling relationship where increased preload
increases stroke volume
• C) A decline in cardiac function
• D) Pulmonary edema
Rationale: The ascending limb of the left ventricular function curve (<15 mm Hg
filling pressure) represents the classic Frank-Starling relationship, where increased
left ventricular filling pressure (preload) leads to increased stroke volume.
11. Which of the following medications reduces preload by redistributing
blood away from the chest into peripheral veins?
• A) ACE inhibitors
• B) ARBs
