receptor
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
A cell or protein structure that detects a specific stimulus, such as light, a chemical or pressure, and triggers a response.
Test yourself
Which word fits the gap? "Light-sensitive _____ in the retina convert incoming light into electrical signals the brain can interpret."
Answer: receptor
In your own words, what does "receptor" mean?
A cell or protein structure that detects a specific stimulus, such as light, a chemical or pressure, and triggers a response.
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