3. What is the residence time of the water in the ocean which estimated by simple flux balance box model? (A) ~1,500 years, (B) ~37,000 years, (C) ~3,700 years, (D) ~150 years, (E) ~1.5 x 104 years

21. A 28 y/o young male visited your outpatient clinic with an elevated blood pressure of 148/100 mmHg. He denies taking any medications, but has a family history of hypertension. His laboratory values were: [Na] 140 mEq/L, [K] 3.1 mEq/L, [Cl] 98 mEq/L, BUN 25 mg/dL, Creatinine 0.9 mg/dL, Glucose: 85 mg/dL. The arterial blood gas (ABG) test reveals: Arterial pH: 7.48, PCO2: 46 mm Hg, HCO3-: 34 mEq/L. What is the most appropriate characterization of his acid-base disorder? (A) Metabolic alkalosis (B) Metabolic alkalosis and respiratory acidosis (C) Respiratory alkalosis and metabolic acidosis (D) Metabolic alkalosis and respiratory alkalosis (E) Respiratory alkalosis

3. What is the residence time of the water in the ocean which estimated by simple flux balance box model?
(A) ~1,500 years,
(B) ~37,000 years,
(C) ~3,700 years,
(D) ~150 years,
(E) ~1.5 x 10⁴ years

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