Which among the following life processes is electrochemical in origin?

Transmission of sensory signals

The correct answer is Option (3) → Transmission of sensory signals

Electrochemical processes involve movement of ions and generation of electrical signals. Nerve impulses are transmitted through electrochemical gradients of ions such as Na⁺ and K⁺.

Option 1: Breathing - Breathing is a mechanical and biochemical process involving gas exchange. It is not electrochemical in origin.

Option 2: Digestion -Digestion involves chemical breakdown of food by enzymes. It is biochemical, not electrochemical.

Option 3: Transmission of sensory signals- Nerve impulses are generated by movement of ions across nerve membranes. This creates electrical signals. Hence, this is electrochemical in origin.

Option 4: Blood circulation- Blood circulation is driven by mechanical pumping of the heart. It is not an electrochemical process.