Feedback signals that inhibit the thirst centers include:

Correct Answer: B

Rationale: Moistening mouth/throat mucosa inhibits thirst signals hydration (e.g., sensory feedback). Stomach/intestinal stretch activates opposite. Both miscombine stretch stimulates. None ignores mucosa false. Mucosal relief distinguishes it, key to thirst cessation, unlike stretch or null options.

Correct Answer: D

Rationale: Compensated metabolic alkalosis shows high PCO₂ (hypoventilation), high HCO₃⁻ (primary), high pH lungs retain CO₂ to offset (e.g., vomiting). Low PCO₂ is uncompensated acute. Low HCO₃⁻/pH is acidosis opposite. High PCO₂/low pH is respiratory acidosis unrelated. Compensation distinguishes it, key to acid-base balance, unlike uncompensated or opposite states.

Correct Answer: C

Rationale: The glomerulus filters blood into Bowman's capsule not loop of Henle (reabsorption), ureter (transport), or collecting duct (concentration). This pinpoints filtration site, critical for GFR, contrasting with later nephron segments.

Correct Answer: B

Rationale: The urethra expels urine from the body not ureter (kidney to bladder), nephron, or loop (kidney). This defines excretory channel, critical for elimination, contrasting with internal structures.

Correct Answer: B

Rationale: Dialysis filters blood in renal failure not gallstones (surgery), BP (meds), or UTIs (antibiotics). This explains its purpose, critical for ESRD, contrasting with unrelated treatments.