Q1
What is the control centre of the nervous system?
AThe brain
BThe spinal cord
CNerves
DThe heart
ICSEClass 7 (ICSE)ScienceCh 20 · Topic 1
The Nervous System
The nervous system controls and coordinates body functions using the brain, spinal cord, and nerves, allowing us to sense and respond to our
Core concept
The brain, the control centre of the nervous system, processes information and controls thoughts, movement, and body functions.
How it works
The spinal cord connects the brain to the rest of the body, carrying messages back and forth through nerves.
Why it matters
Nerves carry electrical signals throughout the body, allowing us to sense things (like touch or pain) and respond (like moving a hand away from heat).
Key detail
A reflex action, like pulling your hand away from something hot, happens very quickly without needing conscious thought from the brain.
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Quick notes
• The nervous system controls and coordinates body functions.
• The brain is the control centre.
• It processes information and controls the body.
• The spinal cord connects brain to body.
• Nerves carry electrical signals.
• They enable sensing and responding.
• A reflex action happens very quickly.
• Reflexes don't need conscious brain thought.