NUR611/NUR 611 Final Exam V3 | Adv
Practice Nursing I Q&A with Rationale |
William Paterson University
1. Which of the following describes the primary pathophysiology of Type 1 Diabetes Mellitus?
A. Insulin resistance in peripheral tissues
B. Autoimmune destruction of pancreatic beta cells
C. Excessive glucagon production by alpha cells
D. Decreased glucose absorption in the small intestine
Correct Answer: B
Expert Explanation: Type 1 Diabetes Mellitus is characterized by an absolute deficiency of
insulin due to the autoimmune destruction of the beta cells in the pancreas. This process is
often mediated by T-cells and results in a total loss of insulin production. In contrast,
insulin resistance is the hallmark of Type 2 Diabetes Mellitus.
2. A patient presents with a ‘staccato’ cough and shortness of breath. Which physical exam
finding is most consistent with Left-Sided Heart Failure?
A. Jugular venous distention
B. Peripheral edema in the lower extremities
C. Hepatomegaly and ascites
D. Pulmonary crackles (rales) upon auscultation
,Correct Answer: D
Expert Explanation: Left-sided heart failure causes blood to back up into the pulmonary
circulation, leading to pulmonary congestion and crackles. This fluid accumulation in the
alveoli impairs gas exchange and creates distinct respiratory sounds. Options A, B, and D
are more typical of right-sided heart failure, where systemic venous congestion occurs.
3. Which electrolyte imbalance is most commonly associated with the use of loop diuretics
such as Furosemide?
A. Hyperkalemia
B. Hypokalemia
C. Hypernatremia
D. Hypocalcemia
Correct Answer: B
Expert Explanation: Loop diuretics inhibit the sodium-potassium-chloride cotransporter
in the thick ascending limb of the loop of Henle, leading to increased excretion of
potassium. This mechanism frequently results in hypokalemia, which requires close
monitoring to prevent cardiac arrhythmias. Clinicians often prescribe potassium
supplements or encourage high-potassium diets to mitigate this effect.
4. In the context of respiratory physiology, what does a ‘shift to the right’ of the oxygen-
hemoglobin dissociation curve indicate?
A. Increased affinity of hemoglobin for oxygen
, B. Decreased affinity of hemoglobin for oxygen, favoring unloading
C. Alkalosis and decreased body temperature
D. Decreased 2,3-BPG levels
Correct Answer: B
Expert Explanation: A shift to the right in the oxygen-hemoglobin dissociation curve
means that hemoglobin has a lower affinity for oxygen, making it easier for oxygen to be
released to the tissues. This shift is typically caused by increased CO2 levels, increased
acidity (lower pH), and increased body temperature. Such physiological adjustments are
beneficial during exercise when tissues require more oxygen delivery.
5. Which clinical marker is the gold standard for diagnosing a myocardial infarction (MI)?
A. Creatine Kinase-MB (CK-MB)
B. Myoglobin
C. Cardiac Troponin I or T
D. Lactate dehydrogenase (LDH)
Correct Answer: C
Expert Explanation: Cardiac troponins are highly sensitive and specific markers of
myocardial cell death and are the preferred test for MI diagnosis. They rise within a few
hours of injury and can remain elevated for several days, providing a broad window for
detection. Other markers like CK-MB are less specific to cardiac muscle compared to
troponins.
Practice Nursing I Q&A with Rationale |
William Paterson University
1. Which of the following describes the primary pathophysiology of Type 1 Diabetes Mellitus?
A. Insulin resistance in peripheral tissues
B. Autoimmune destruction of pancreatic beta cells
C. Excessive glucagon production by alpha cells
D. Decreased glucose absorption in the small intestine
Correct Answer: B
Expert Explanation: Type 1 Diabetes Mellitus is characterized by an absolute deficiency of
insulin due to the autoimmune destruction of the beta cells in the pancreas. This process is
often mediated by T-cells and results in a total loss of insulin production. In contrast,
insulin resistance is the hallmark of Type 2 Diabetes Mellitus.
2. A patient presents with a ‘staccato’ cough and shortness of breath. Which physical exam
finding is most consistent with Left-Sided Heart Failure?
A. Jugular venous distention
B. Peripheral edema in the lower extremities
C. Hepatomegaly and ascites
D. Pulmonary crackles (rales) upon auscultation
,Correct Answer: D
Expert Explanation: Left-sided heart failure causes blood to back up into the pulmonary
circulation, leading to pulmonary congestion and crackles. This fluid accumulation in the
alveoli impairs gas exchange and creates distinct respiratory sounds. Options A, B, and D
are more typical of right-sided heart failure, where systemic venous congestion occurs.
3. Which electrolyte imbalance is most commonly associated with the use of loop diuretics
such as Furosemide?
A. Hyperkalemia
B. Hypokalemia
C. Hypernatremia
D. Hypocalcemia
Correct Answer: B
Expert Explanation: Loop diuretics inhibit the sodium-potassium-chloride cotransporter
in the thick ascending limb of the loop of Henle, leading to increased excretion of
potassium. This mechanism frequently results in hypokalemia, which requires close
monitoring to prevent cardiac arrhythmias. Clinicians often prescribe potassium
supplements or encourage high-potassium diets to mitigate this effect.
4. In the context of respiratory physiology, what does a ‘shift to the right’ of the oxygen-
hemoglobin dissociation curve indicate?
A. Increased affinity of hemoglobin for oxygen
, B. Decreased affinity of hemoglobin for oxygen, favoring unloading
C. Alkalosis and decreased body temperature
D. Decreased 2,3-BPG levels
Correct Answer: B
Expert Explanation: A shift to the right in the oxygen-hemoglobin dissociation curve
means that hemoglobin has a lower affinity for oxygen, making it easier for oxygen to be
released to the tissues. This shift is typically caused by increased CO2 levels, increased
acidity (lower pH), and increased body temperature. Such physiological adjustments are
beneficial during exercise when tissues require more oxygen delivery.
5. Which clinical marker is the gold standard for diagnosing a myocardial infarction (MI)?
A. Creatine Kinase-MB (CK-MB)
B. Myoglobin
C. Cardiac Troponin I or T
D. Lactate dehydrogenase (LDH)
Correct Answer: C
Expert Explanation: Cardiac troponins are highly sensitive and specific markers of
myocardial cell death and are the preferred test for MI diagnosis. They rise within a few
hours of injury and can remain elevated for several days, providing a broad window for
detection. Other markers like CK-MB are less specific to cardiac muscle compared to
troponins.
