Hypertension & Type 2 Diabetes | Prescription Writing
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[Section 1: Hypertension & Type 2 Diabetes Pathophysiology Integration (Q1-10)]
Q1. A 58-year-old patient with T2DM and hypertension presents with persistent
microalbuminuria. The pathophysiologic mechanism linking insulin resistance to
hypertension primarily involves activation of which system?
A. Parasympathetic nervous system
B. Renin-angiotensin-aldosterone system (RAAS) [CORRECT]
C. Hypothalamic-pituitary-adrenal axis only
D. Gamma-aminobutyric acid pathway
Correct Answer: B
Rationale: Insulin resistance activates RAAS through multiple pathways including
sympathetic nervous system stimulation and direct renal effects, leading to sodium
retention, vascular smooth muscle proliferation, and endothelial dysfunction. The
parasympathetic system and GABA pathway are not primary mediators of this
cardiometabolic link.
Q2. In a patient with type 2 diabetes, chronic hyperglycemia causes endothelial
dysfunction primarily by:
,A. Increasing nitric oxide (NO) bioavailability
B. Reducing advanced glycation end-products (AGEs)
C. Decreasing nitric oxide and increasing endothelin-1 [CORRECT]
D. Stabilizing vascular smooth muscle cell membranes
Correct Answer: C
Rationale: Hyperglycemia reduces NO bioavailability via oxidative stress and increases
endothelin-1, causing vasoconstriction and impaired vasodilation. AGEs are increased,
not reduced, in hyperglycemia.
Q3. A patient with T2DM and hypertension develops progressive diabetic nephropathy.
Which pathophysiologic process describes the primary driver of glomerular damage?
A. Glomerular hyperfiltration mediated by RAAS activation [CORRECT]
B. Purely osmotic damage from glucose crystals
C. Direct viral infection of podocytes
D. Autoimmune destruction of the juxtaglomerular apparatus
Correct Answer: A
Rationale: RAAS activation causes efferent arteriolar vasoconstriction, increasing
intraglomerular pressure and driving hyperfiltration, proteinuria, and progressive
nephron loss. Glucose does not crystallize in glomeruli, and autoimmune destruction is
not the mechanism.
Q4. Insulin resistance contributes to sodium and water retention through which
mechanism?
A. Decreased sympathetic nervous system activity
B. Enhanced sodium excretion at the distal convoluted tubule
, C. Increased activity of the epithelial sodium channel (ENaC) and Na⁺/K⁺-ATPase
[CORRECT]
D. Downregulation of mineralocorticoid receptors
Correct Answer: C
Rationale: Insulin resistance increases renal sodium reabsorption via ENaC and
Na⁺/K⁺-ATPase stimulation, expanding plasma volume and elevating blood pressure.
Sympathetic activity is increased, not decreased, in insulin resistance.
Q5. Microalbuminuria (urine albumin-to-creatinine ratio 30-300 mg/g) in a patient with
T2DM and hypertension signifies:
A. Benign protein excretion requiring no intervention
B. Early marker of diabetic nephropathy and increased cardiovascular risk [CORRECT]
C. Exclusive marker of urinary tract infection
D. Normal variation in renal function
Correct Answer: B
Rationale: Microalbuminuria is the earliest clinical marker of diabetic nephropathy and
independently predicts cardiovascular morbidity and mortality, mandating ACE inhibitor
or ARB therapy and aggressive risk factor modification.
Q6. Excessive sympathetic nervous system activation in patients with coexisting
hypertension and type 2 diabetes contributes to:
A. Enhanced insulin sensitivity and vasodilation
B. Increased heart rate, vasoconstriction, and hepatic glucose output [CORRECT]
C. Decreased renin secretion from juxtaglomerular cells
D. Improved glycemic control through increased glucagon secretion