Question

If a person steps on a sharp object, it is detected in the foot by a __________ and a message is fired off to the central nervous system

Answer 1

The answer is 'a receptor or a neuron'...
A receptor or a neuron detects the stimuli and fires a message to the central nervous system..

HOPE THIS HELPS YOU

Answer 2

If a person steps on a sharp object like pain it is detected in the foot by a receptor and a message is fired of to the central nervous system.

● A stimulus, a pin in the paw for instance, starts a motivation in the tactile or receptor neuron that passes through a neurotransmitter to the transfer neuron arranged in the spinal line and afterward by means of another neural connection to the engine neurone.

● This transmits the motivation to the muscle making it agreement and expel the paw from the pin or the sharp object.