Figure 20.30: Reflex Arc: When you touch something hot, you may jerk your hand away
without even thinking about it; the nerve impulse from your hand travels to the spinal cord
and the spinal cord sends a message to your muscles to pull back your hand. ( 5 )
Figure 20.31: Reflex Arc: When you touch something hot, you may jerk your hand away
without even thinking about it; the nerve impulse from your hand travels to the spinal cord
and the spinal cord sends a message to your muscles to pull back your hand. ( 14 )