Question
In a reflex action the signal from a sensory receptor is carried by a __ neurone to a relay neurone. What is the missing word?
Answer
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Kyle
Master · Tutor for 5 years
Answer
Sensory
Explanation
The function of the specific nerve cell (also called a neuron) in the spinal cord receives the signal from a sensory receptor and flips it to send it back to your muscles. This actually occurs before your brain is aware of the sensations that caused it in the first place. That makes the signal transfers very quick, leading to an instantaneous reflex response to stimuli. Considering the central nervous system's structure, this neuron is commonly referred to as the sensory or afferent neuron.