D115: Advanced Pathophysiology for the Advanced Practice Nurse — Original Latest Version Study Set

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Sample questions from D115: Advanced Pathophysiology for the Advanced Practice Nurse — Original Latest Version Study Set

This material has 90 questions with answers and rationales. Here are the first 5.

1. 1.A patient with a crush injury has local tissue swelling, warmth, and pain. Which process most directly accounts for the increased capillary permeability at the injury site?

   • A.Inhibition of prostaglandin synthesis
   • B.Histamine release causing endothelial gaps
   • C.Decreased local blood flow from vasodilation
   • D.Reduced leukocyte adhesion to the endothelium

   Rationale: Histamine released by mast cells promotes vasodilation and increases postcapillary venule permeability, allowing fluid and proteins to enter injured tissue. Reduced leukocyte adhesion would limit inflammatory cell recruitment rather than cause the swelling. Prostaglandins contribute to pain and vasodilation, but their inhibition would not explain the increased permeability. Vasodilation generally increases local blood flow, not decreases it; the exam takeaway is to connect acute inflammatory mediators with their characteristic vascular effects.

2. 2.A patient with prolonged hypotension develops acute kidney injury. At the cellular level, which event is the most immediate consequence of inadequate oxygen delivery?

   • A.Increased mitochondrial ATP generation
   • B.Enhanced sodium-potassium pump activity
   • C.Reduced oxidative phosphorylation and ATP production
   • D.Increased synthesis of membrane phospholipids

   Rationale: Oxygen deprivation limits oxidative phosphorylation, reducing ATP available for essential cellular work. Phospholipid synthesis and ATP generation do not increase as a consequence of ischemia. The sodium-potassium pump requires ATP, so its activity falls rather than rises, contributing to cellular swelling and ion imbalance. The key pathophysiologic sequence is hypoxia, ATP depletion, pump failure, and cellular injury.

3. 3.A patient has a small area of acute inflammation after a skin abrasion. Which findings or processes are characteristic of acute inflammation? Select all that apply.

   • A.Leukocyte migration includes movement through the vessel wall
   • B.Vasodilation contributes to local warmth and erythema
   • C.Neutrophils are prominent early in the response
   • D.Increased vascular permeability can produce edema
   • E.Fibroblasts are the predominant first cells recruited

   Rationale: Neutrophils are typically the dominant early leukocytes, and vasodilation accounts for increased local blood flow, warmth, and erythema. Increased vascular permeability allows protein-rich fluid to leave the vessels and contribute to edema. Fibroblasts are more important in later repair and scar formation, not as the predominant first recruited cells. Leukocytes undergo transmigration through the vessel wall to reach injured tissue.

4. 4.A patient with an acute bacterial infection has an elevated C-reactive protein level. Which statement best describes this finding?

   • A.It is a nonspecific acute-phase protein produced mainly by the liver
   • B.It indicates that antibody-mediated immunity has failed
   • C.It identifies the exact organism causing the infection
   • D.It is a measure of the number of circulating neutrophils

   Answer and rationale are in the full material.

5. 5.A patient with a severe infection develops widespread endothelial injury, microthrombi, and bleeding from venipuncture sites. Which mechanism best explains this combination?

   • A.Localized vasoconstriction limited to the infected tissue
   • B.Isolated platelet overproduction
   • C.Suppression of fibrinolysis without coagulation activation
   • D.Systemic activation and consumption of coagulation factors

   Answer and rationale are in the full material.