Neco 2020 Biology Question 4

Practice objective / multiple choice question 4 from the 2020 Neco Biology examination.

Neco 2020 Biology Objective / Multiple Choice Medium Difficulty
Question 4 NECO • 2020 • BIOLOGY • objective

A patient's arterial blood gas shows pH \(7.30\), PaCO\(_2\) \(30\) mmHg and HCO\(_3^-\) \(15\) mEq/L.\n(a) Identify the primary acid‑base disturbance and state whether the respiratory response is appropriate.\n(b) If the patient hyperventilates and reduces PaCO\(_2\) to \(25\) mmHg, what is the expected new pH? (Use the Henderson-Hasselbalch equation \(pH = pK_a + \log\frac{[HCO_3^-]}{0.03\times PaCO_2}\) with \(pK_a = 6.1\)).

Answer Options

A. Primary respiratory acidosis; respiratory compensation is inappropriate. New pH \\(\\approx 7.25\\).
B. Primary metabolic alkalosis; respiratory compensation is appropriate. New pH \\(\\approx 7.55\\).
C. Primary metabolic acidosis; respiratory compensation is inappropriate. New pH \\(\\approx 7.30\\).
Correct Answer D. Primary metabolic acidosis; respiratory compensation is appropriate. New pH \(\approx 7.40\).
Correct Answer
D
Correct Option:
Primary metabolic acidosis; respiratory compensation is appropriate. New pH \(\approx 7.40\).

About This Question

This is Neco 2020 Biology Question 4. It is one of the objective questions from the 2020 Neco Biology examination.

Difficulty level: Medium .

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