Example 1 · difficulty 1/5
The resting membrane potential of a neuron is actively maintained by the sodium–potassium pump operating across the axolemma. The ratio in which this pump transports Na⁺ outwards to K⁺ inwards is:
- A. 2 Na⁺ outwards : 3 K⁺ inwards
- B. 1 Na⁺ outwards : 1 K⁺ inwards
- C. 3 Na⁺ outwards : 2 K⁺ inwards
- D. 3 K⁺ outwards : 2 Na⁺ inwards