How do impulses travel through the CNS? gcse biologyWatch this thread
CNS = brain + spinal cord.
Impulses travel away from the cell body along an axon. An impulse is initiated
EITHER: FROM the brain e.g. via a motor nerve to initiate contraction of a muscle
OR: when a sense organ is activated by a stimulus e.g. a hair cell in the inner ear [cochlea] for hearing sends an impulse along a sensory nerve TO the brain other e.g. a rod or cone in the eye sends an impulse to the back of the brain so making vision possible, [yeah?]
OR: when impulses travel from one part of the brain to another e.g. when we see s-t and we recognize it the message to the brain from the eyes interacts [sends a message WITHIN the brain] with the "memory centre" of the brain to compare past and present info
Impulses pass from one neurone [nerve cell] to the next at a synapse where a chemical messenger diffuses from the 1st cell to the 2nd and stimulates or inhibits a receptor.
What is your prediction?