Transcription factors; Neurotransmitters; Enhancer regions of DNA Receptors on
Initiation complex RNA polymerase II Transcription
Transcription rate dendrites and cell body
Action potential (impulse)
Integrator modulation Chemical modulation of Calcium channels initiation complex proteins
Consequence of unit activity
The "consequences of unit activity" include inputs to other units (genes or neurones). Transcription factors are proteins, so the expression of one gene (encoding a transcription factor) can affect the expression of others. Action potentials release neurotransmitters from axon termini, so the activity of one neurone can affect the activities of others. In the diagram, the "O" of one unit is an "I" for one or more others.
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