REFLEX ARC
STIMULUS → RESPONSE · NO BRAIN
prostudypk.com
Touch a Flame: Reflex
spinal cord
sensory neuron
relay neuron
motor neuron
muscle
step
≈ 0.05 s
real reflex time
No
brain decision
1. Reflex Arc Path
1
Receptor (skin)
2
Sensory neuron
3
Spinal cord
4
Motor neuron
5
Effector (muscle)
2. Why So Fast?
The signal does not go to the brain; the spinal cord responds
The brain feels the pain afterwards
3. Remember
Reflex = automatic, fast, bina soche
Examples: blinking, knee jerk
MATRIC BIOLOGY · NERVOUS SYSTEM · PUNJAB BOARDS
‹ Labs
↺
❚❚
1×
Next ›