Unformatted text preview: ivity effectively. In contrast, many excitatory
s ynapes form on dendrites where their activity produce tiny potentials that are
s ummed up to produce an effect.
The total number of synaptic proﬁ les increases exponentially through the ﬁ rst
postnatal week and then continues to increase at a lower rate over the next
s everal weeks. motor neuron axons are labeled below with BTX. This shows the
c olocalization of the neurons s ynapse signaling is highly localized so that neurotransmitters can act
quickly. Diffusion would be a slow process and thus not efﬁ cient for
s ignaling. NMJ as a model to study synapse formation" Presynaptic"
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- Spring '12
- Chemical synapse, Agrin