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A-Level Biology OCR A

Cholinergic Excitatory Postsynaptic Ap Triggered Explain Synapse Called

Cholinergic synapses are considered excitatory because acetylcholine causes depolarization of the postsynaptic neuron, potentially triggering an action potential. Inhibitory synapses, conversely, use neurotransmitters that cause hyperpolarization.

Las sinapsis colinérgicas se consideran excitatorias porque la acetilcolina causa la despolarización de la neurona postsináptica, lo que puede desencadenar un potencial de acción si se alcanza el umbral. En contraste, las sinapsis inhibitorias utilizan neurotransmisores que causan hiperpolarización.

Front Explain why a cholinergic synapse is called excitatory & not inhibitory.
Back Cholinergic synapses:
  • Excitatory bc acetylcholine results in depolarisation of postsynaptic neurone
  • If threshold reached, an AP is triggered
  • Inhibitory synapses have neurotransmitters tha tresult in hyperpolarisation of postsynaptic membrane, preventing an AP from being triggered

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