6.2.2 Synaptic transmission Flashcards
1
Q
Structure of a neuromuscular junction.
A
Presynaptic membrane = synaptic knob; axon terminal of a motor neurone
Postsynaptic membrane = sarcolemma
Synaptic knob contains many mitochondria, and vesicles of acetylcholine.
Space between pre and post synaptic membranes = synaptic gap.
Sarcolemma has acetylcholine receptors, and ligand-gated sodium ion channels (the two being different parts of the same membrane-bound protein).
