At a cholinergic synapse, the arrival of an action potential causes

  1. ACh to be hydrolysed
  2. K⁺ to enter the postsynaptic cell
  3. Ca²⁺ ions to enter the presynaptic knob
  4. vesicles to be made
Answer

C) Ca²⁺ ions to enter the presynaptic knob

Ca²⁺ triggers exocytosis. 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