NUR 641EA Exam 2 V1 | NUR 641EA Advanced
Pathophysiology and Pharmacology for Nurse
Educators | Actual Q&A with Rationale (NUR641EA
Exam 2) | Grand Canyon University
1. A nurse educator is explaining the pathophysiological compensatory mechanisms that
occur during the progression of heart failure. Which of the following responses are triggered
by a decrease in cardiac output? (Select all that apply)
A. Activation of the renin-angiotensin-aldosterone system (RAAS)
B. Release of atrial natriuretic peptide (ANP)
C. Increased sympathetic nervous system (SNS) activity
D. Peripheral vasodilation to reduce afterload
E. Myocardial hypertrophy and remodeling
F. Decreased secretion of antidiuretic hormone (ADH)
Correct Answer: A, B, C, E
Explanation: When cardiac output falls, the body initiates several compensatory
mechanisms to maintain perfusion. The SNS increases heart rate and contractility, while
the RAAS promotes water and sodium retention to increase preload. Chronic activation of
these systems leads to deleterious myocardial remodeling and hypertrophy, and ANP is
released in response to atrial stretch. Peripheral vasoconstriction, not vasodilation, occurs,
and ADH levels typically increase to maintain volume.
,2. When managing a patient with hypertension and chronic kidney disease, which class of
antihypertensive medications is preferred due to its renoprotective effects?
A. Angiotensin-converting enzyme (ACE) inhibitors
B. Calcium channel blockers
C. Beta-blockers
D. Loop diuretics
Correct Answer: A
Explanation: ACE inhibitors are the preferred treatment for patients with hypertension
and CKD because they reduce intraglomerular pressure by dilating the efferent arteriole.
This mechanism helps to slow the progression of diabetic and non-diabetic nephropathy.
While other agents may lower blood pressure, ACE inhibitors specifically target the renin-
angiotensin system which is often overactive in renal disease.
3. A patient presents with acute respiratory distress syndrome (ARDS). Which
pathophysiological change is most characteristic of the exudative phase of this condition?
A. Increased capillary permeability and alveolar edema
B. Proliferation of type II pneumocytes
C. Alveolar fibrosis and scarring
D. Resolution of pulmonary hypertension
Correct Answer: A
,Explanation: The exudative phase of ARDS is characterized by damage to the alveolar-
capillary membrane, leading to increased permeability and the accumulation of protein-
rich fluid in the alveoli. This results in severe ventilation-perfusion mismatch and shunting.
Fibrosis occurs in later stages, and type II pneumocyte proliferation is a feature of the
proliferative phase.
4. In the management of chronic obstructive pulmonary disease (COPD), what is the primary
mechanism of action for long-acting muscarinic antagonists (LAMA)?
A. Inhibition of phosphodiesterase to increase cAMP
B. Stimulation of beta-2 adrenergic receptors
C. Competitive inhibition of acetylcholine at M3 receptors
D. Stabilization of mast cell membranes
Correct Answer: C
Explanation: LAMAs like tiotropium work by blocking the action of acetylcholine at
muscarinic receptors (specifically M3) in the bronchial smooth muscle. This leads to
bronchodilation by preventing the parasympathetic nervous system from causing
bronchoconstriction. This class of drug is a cornerstone in the maintenance treatment of
COPD to improve lung function and reduce exacerbations.
5. A 65-year-old male is diagnosed with stable angina. The provider prescribes sublingual
nitroglycerin. What is the hemodynamic effect of this medication?
A. Increased myocardial contractility
, B. Selective dilation of coronary arteries only
C. Increased systemic vascular resistance
D. Decreased preload via peripheral vasodilation
Correct Answer: D
Explanation: Nitroglycerin primarily acts as a venous dilator, which increases venous
pooling and decreases the volume of blood returning to the heart (preload). By reducing
preload, the myocardial oxygen demand is lowered, which relieves anginal pain. While it
does dilate coronary arteries to some extent, its most significant effect in stable angina is
the reduction of ventricular wall tension.
6. Which of the following laboratory findings is most indicative of pre-renal acute kidney
injury (AKI)?
A. Fractional excretion of sodium (FeNa) > 2%
B. Urine specific gravity < 1.010
C. BUN to Creatinine ratio > 20:1
D. Presence of brown granular casts in urine
Correct Answer: C
Explanation: A BUN to Creatinine ratio greater than 20:1 is a hallmark of pre-renal AKI,
reflecting increased urea reabsorption in the setting of reduced renal perfusion. In pre-
renal states, the kidneys are still functional and attempt to conserve water and sodium,
Pathophysiology and Pharmacology for Nurse
Educators | Actual Q&A with Rationale (NUR641EA
Exam 2) | Grand Canyon University
1. A nurse educator is explaining the pathophysiological compensatory mechanisms that
occur during the progression of heart failure. Which of the following responses are triggered
by a decrease in cardiac output? (Select all that apply)
A. Activation of the renin-angiotensin-aldosterone system (RAAS)
B. Release of atrial natriuretic peptide (ANP)
C. Increased sympathetic nervous system (SNS) activity
D. Peripheral vasodilation to reduce afterload
E. Myocardial hypertrophy and remodeling
F. Decreased secretion of antidiuretic hormone (ADH)
Correct Answer: A, B, C, E
Explanation: When cardiac output falls, the body initiates several compensatory
mechanisms to maintain perfusion. The SNS increases heart rate and contractility, while
the RAAS promotes water and sodium retention to increase preload. Chronic activation of
these systems leads to deleterious myocardial remodeling and hypertrophy, and ANP is
released in response to atrial stretch. Peripheral vasoconstriction, not vasodilation, occurs,
and ADH levels typically increase to maintain volume.
,2. When managing a patient with hypertension and chronic kidney disease, which class of
antihypertensive medications is preferred due to its renoprotective effects?
A. Angiotensin-converting enzyme (ACE) inhibitors
B. Calcium channel blockers
C. Beta-blockers
D. Loop diuretics
Correct Answer: A
Explanation: ACE inhibitors are the preferred treatment for patients with hypertension
and CKD because they reduce intraglomerular pressure by dilating the efferent arteriole.
This mechanism helps to slow the progression of diabetic and non-diabetic nephropathy.
While other agents may lower blood pressure, ACE inhibitors specifically target the renin-
angiotensin system which is often overactive in renal disease.
3. A patient presents with acute respiratory distress syndrome (ARDS). Which
pathophysiological change is most characteristic of the exudative phase of this condition?
A. Increased capillary permeability and alveolar edema
B. Proliferation of type II pneumocytes
C. Alveolar fibrosis and scarring
D. Resolution of pulmonary hypertension
Correct Answer: A
,Explanation: The exudative phase of ARDS is characterized by damage to the alveolar-
capillary membrane, leading to increased permeability and the accumulation of protein-
rich fluid in the alveoli. This results in severe ventilation-perfusion mismatch and shunting.
Fibrosis occurs in later stages, and type II pneumocyte proliferation is a feature of the
proliferative phase.
4. In the management of chronic obstructive pulmonary disease (COPD), what is the primary
mechanism of action for long-acting muscarinic antagonists (LAMA)?
A. Inhibition of phosphodiesterase to increase cAMP
B. Stimulation of beta-2 adrenergic receptors
C. Competitive inhibition of acetylcholine at M3 receptors
D. Stabilization of mast cell membranes
Correct Answer: C
Explanation: LAMAs like tiotropium work by blocking the action of acetylcholine at
muscarinic receptors (specifically M3) in the bronchial smooth muscle. This leads to
bronchodilation by preventing the parasympathetic nervous system from causing
bronchoconstriction. This class of drug is a cornerstone in the maintenance treatment of
COPD to improve lung function and reduce exacerbations.
5. A 65-year-old male is diagnosed with stable angina. The provider prescribes sublingual
nitroglycerin. What is the hemodynamic effect of this medication?
A. Increased myocardial contractility
, B. Selective dilation of coronary arteries only
C. Increased systemic vascular resistance
D. Decreased preload via peripheral vasodilation
Correct Answer: D
Explanation: Nitroglycerin primarily acts as a venous dilator, which increases venous
pooling and decreases the volume of blood returning to the heart (preload). By reducing
preload, the myocardial oxygen demand is lowered, which relieves anginal pain. While it
does dilate coronary arteries to some extent, its most significant effect in stable angina is
the reduction of ventricular wall tension.
6. Which of the following laboratory findings is most indicative of pre-renal acute kidney
injury (AKI)?
A. Fractional excretion of sodium (FeNa) > 2%
B. Urine specific gravity < 1.010
C. BUN to Creatinine ratio > 20:1
D. Presence of brown granular casts in urine
Correct Answer: C
Explanation: A BUN to Creatinine ratio greater than 20:1 is a hallmark of pre-renal AKI,
reflecting increased urea reabsorption in the setting of reduced renal perfusion. In pre-
renal states, the kidneys are still functional and attempt to conserve water and sodium,
