the interaction function

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3 an association neuron or interneuron which generates an immediate response

4 motor nerve along which the order travels to the effector organ
5 an effector organ which executes the response (this case it contracts and we pull our hand away)
voluntary actions
voluntary actions are conscious, deliberate responses that are coordinated by the encephalon
the following elements take part in a voluntary action:
1 a receptor which perceives the stimulus
2 a sensory nerve which transmits the impulse to the spinal cord and from there to the encephalon, cerebral cortex
3 the cerebral cortex, turns the information into a conscious sensation, generate a response order which it then sends through the spinal cord to a motor nerve
4 a motor nerve along which the order travels to the effector organ
5 an effector organ contracts voluntarily
The right-hand part of the encephalon controls the left-hand side of the body, and vice versa.This is because the nerve fibers of the spinal cord cross over when they enter the encephalon and end up in the opposite hemisphere of the brain

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