MSN Advanced Pathophysiology

Question 1

Which mechanism primarily causes the symptoms of heart failure?

Accepted Answer

Compensatory neurohormonal activation leading to fluid retention

Answer

In heart failure, the renin-angiotensin-aldosterone system and sympathetic nervous system activate compensatorily, leading to sodium and water retention that worsens congestion.

Question 2

In type 2 diabetes mellitus, which pathophysiological process is most central?

Accepted Answer

Peripheral insulin resistance combined with progressive beta cell dysfunction

Answer

Type 2 DM is characterized by peripheral insulin resistance and gradual beta cell failure, unlike Type 1 which involves autoimmune destruction.

Question 3

Which inflammatory mediator is primarily responsible for fever during an acute infection?

Accepted Answer

Interleukin-1 (IL-1) and prostaglandin E2

Answer

IL-1 stimulates the hypothalamus to increase prostaglandin E2 synthesis, which resets the thermoregulatory set point upward causing fever.

Question 4

A patient develops acute respiratory distress syndrome (ARDS). Which pathophysiological change occurs first?

Accepted Answer

Diffuse alveolar damage with increased capillary permeability

Answer

ARDS begins with diffuse alveolar damage that increases pulmonary capillary permeability, allowing protein-rich fluid to flood the alveoli.

Question 5

In chronic kidney disease, which compensatory mechanism initially maintains glomerular filtration rate?

Accepted Answer

Hyperfiltration in remaining nephrons

Answer

Remaining functional nephrons undergo hyperfiltration to compensate for nephron loss, which temporarily maintains GFR but accelerates further injury.

MSN - Master Of Science In Nursing Degree Practice Test

MSN - Master Of Science In Nursing Degree Practice Test

MSN Advanced Pathophysiology