Biology
How do cells convert chemical energy into motion?
Quick fact
Muscle cells use ATP energy to produce force by sliding protein filaments past each other.
Why this is interesting
Every movement, from blinking to running, is the result of billions of microscopic interactions inside your muscles.
Read the full explanation
Understanding How do cells convert chemical energy into motion?
Muscles contract when signals from the nervous system trigger chemical changes inside muscle fibres.
A deeper explanation
The muscular system combines biology, chemistry, and physics. Electrical signals from the brain activate muscles, where molecular machines convert chemical energy into mechanical force. This allows humans to move, maintain posture, and produce heat.