yana-notes

Synapse

10-10-2021: reference:

Synapse #

Synaptic Cleft #

  1. Axosynaptic: Axon terminal ends on another axon terminal
  2. Axoaxonic: Axon of one neuron makes synapse with axon of the other neuron.vesicle
  3. Axodendritic: Synaptic cleft between axon and dendrite.
    • ~30% of CNS synapses
  4. Dendrodendritic
  5. Axosomatic: Synaptic cleft is present between axon and cell body or soma.
    • ~6%
  6. Axosecretory: Axon terminal secretes directly into bloodstream
  7. 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.