Synapse
10-10-2021: reference:
Synapse #
Synaptic Cleft #
- Axosynaptic: Axon terminal ends on another axon terminal
- Axoaxonic: Axon of one neuron makes synapse with axon of the other neuron.vesicle
- Axodendritic: Synaptic cleft between axon and dendrite.
- ~30% of CNS synapses
- Dendrodendritic
- Axosomatic: Synaptic cleft is present between axon and cell body or soma.
- ~6%
- Axosecretory: Axon terminal secretes directly into bloodstream
- Axoextraceullar: Axon with no connection secretes into extracellular fluid
The difference in thickness between the pre- and post-synaptic membrane also is worthy of note. When the postsynaptic membrane is thicker, it’s usually excitatory, while symmetrical synapses are usually inhibitory.