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IB Biology HL

Ca Neurotransmitters Action Potential Arrives Axon Terminal Voltage Gated

The process of chemical transfer across synapses involves: an action potential arriving at the axon terminal, voltage-gated Ca2+ channels opening, Ca2+ entering the presynaptic neuron, Ca2+ signaling neurotransmitter vesicles to dock, neurotransmitter release via exocytosis, neurotransmitters binding to receptors, and finally, a signal being initiated in the postsynaptic cell.

1. potentiel d'action arrive au terminal de l'axone 2. canaux Ca2+ voltage-dépendants s'ouvrent 3. Ca2+ entre dans le neurone présynaptique 4. Ca2+ signale aux vésicules de neurotransmetteurs de s'ancrer 5. neurotransmetteurs libérés (exocytose) 6. neurotransmetteurs se lient aux récepteurs 7. signal initié dans la cellule post-synaptique

Original 1. action potential arrives at axon terminal
2. voltage-gated Ca2+ channels open
3. Ca2+ enters presynaptic neuron 
4. Ca2+ signals neurotransmitter vesicles to dock
5. neurotransmitters released (exocytosis)
6. neurotransmitters bind to receptors 
7. signal initiated in postsynaptic cell 
Title chemical transfer across synapses 
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signals neurotransmitter vesicles to dock
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Full
1. action potential arrives at axon terminal
2. voltage-gated Ca
2+
 channels open
3. Ca
2+
 enters presynaptic neuron 
4. Ca
2+
signals neurotransmitter vesicles to dock
5. neurotransmitters released (exocytosis)
6. neurotransmitters bind to receptors 
7. signal initiated in postsynaptic cell 

Tags: 6_5_neurons_synapses

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