A buffer will
enhance changes in the pH of solutions
resist drastic changes in the pH of solutions
have no effect on the pH of solutions
make a solution more acidic
make a solution more basic
The Correct Answer is B
A. enhance changes in the pH of solutions: A buffer does the opposite-it prevents drastic pH changes.
B. resist drastic changes in the pH of solutions: Buffers help maintain stable pH by neutralizing excess acids or bases (e.g., bicarbonate buffer system in blood).
C. have no effect on the pH of solutions: Buffers do affect pH-they stabilize it.
D. make a solution more acidic: Buffers don’t always make solutions acidic; they can neutralize both acids and bases.
E. make a solution more basic: Same rationale-buffers do not push pH in one direction, they resist change.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. 1,3,3,1,2,4: This order is illogical-it repeats pleura in an inconsistent pattern and places visceral pleura first.
B. 3,1,1,3,4,2: It ends with visceral pericardium followed by parietal, which is anatomically reversed.
C. 1,3,3,1,4,2: Starts with visceral instead of parietal and ends in the wrong order.
D. 3,1,1,3,2,4: This choice correctly represents the entry path: through parietal pleura (3) → visceral pleura (1) → lung → parietal pericardium (2) → visceral pericardium (4) → heart.
Correct Answer is B
Explanation
A. a decrease in heart rate: Low oxygen usually triggers the body to increase heart rate to deliver more oxygen-not decrease it.
B. an increase in the respiratory rate: In negative feedback, low oxygen stimulates chemoreceptors which trigger an increase in respiratory rate to bring in more oxygen.
C. a decrease in the respiratory rate: This would worsen the low oxygen state, and is contrary to how the body responds.
D. A and C: Both options are inappropriate responses to low oxygen levels.
E. A and B: While B is correct, A is not, so this combination is also incorrect.
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