Which among the following life processes is electrochemical in origin ?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Transmission of sensory signals
Electrochemistry deals with the conversion of chemical energy into electrical energy and back. In living cells, the transmission of sensory signals through nerve cells to the brain, and back, is an electrical signal produced by the movement of ions (such as \( \ce{Na+} \) and \( \ce{K+} \)) across cell membranes, so it is electrochemical in origin.
NCERT (2026-27 edition):
Electrochemistry – “… The transmission of sensory signals through cells to brain and vice versa and communication between the cells are known to have electrochemical origin.”