Question

Explain in your own words, and from an engineering perspective, why signals are transmitted via chemical...

Explain in your own words, and from an engineering perspective, why signals are transmitted via chemical synapses? (Incorporate in your answer the fact that signals are not transmitted until a threshold value of polarization is reached).

Homework Answers

Answer #1
  • The electrical signal cannot “jump” over that gap. Instead, at the point of synaptic junction between two neurons, the electrical signal is “translated” into a chemical message (the neurotransmitter) by the presynaptic neuron (at the presynaptic terminal) – Step 1 & 2.
  • That chemical diffuses (“swims”) across the synaptic cleft until it reaches the other neuron – Step 2 & 3.
  • The other neuron then “translates” the chemical signal back into an electrical one – Step 3 & 4.
  • The chemical message is degraded – Step 5
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