Repolarisation is caused by

  1. K⁺ ions diffusing out through voltage-gated channels
  2. Ca²⁺ entering
  3. acetylcholine binding
  4. Na⁺ ions diffusing in
Answer

A) K⁺ ions diffusing out through voltage-gated channels

K⁺ efflux. AS & A Level Biology · Topic 15 Control and Coordination · 15.1 Control and coordination in mammals

Biology MCQ · More A Level Biology: Control and coordination MCQs · Practise