Locusts ability to smell an odour

Subject – Science and Tech

Context – Researchers at Washington University in St. Louis found the answer as to how locusts smell an odour

Concept –

The ability to smell coffee immaterial of the presence of other interfering smells or the environment remains the same in humans.
In effect, other smells or different environmental factors do not get in the way of our ability to experience the smell of individual odours.
The locust exploited two functional types of neurons: those that are activated when an odourant is present, and those which are silenced when an odourant is present but become activated after the odour presentation ends.
To recognise an odourant’s presence, researchers simply needed to add evidence for the odourant being present and subtract evidence against that odour being present.