Skip to content

Course home

x
Synapses and neurotransmitters
x

Chemical synapses at a glance

Chemical synapses at a glance

Labelled chemical synapse showing presynaptic knob, synaptic cleft, Ca²⁺ entry, neurotransmitter release, receptors, and Na⁺ entry into the postsynaptic neurone A chemical synapse is a tiny junction where one neurone passes a signal to another neurone or to an effector such as a muscle cell. At most synapses, the signal changes from electrical to chemical and then back to electrical.

Synapses and neurotransmitters Lesson

  1. A Level
  2. /Biology
  3. /Synapses and neurotransmitters

Step-by-step lessons on Edexcel A A Level Biology Synapses and neurotransmitters. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.

Lessons