2.84- Impulses

Understand that stimulation of receptors in the sense organs sends electrical impulses along nerves into and out of the central nervous system, resulting in rapid responses

• Receptors:
• These detect the stimuli like temperature
• They are connected to the CNS by the sensory nerve
• The electrical impulse travels to the CNS using the sensory nerve
• It is then transferred to the motor nerve by the relay nerve
• The motor nerve carry the impules from the CNS to the effectors
• The genes store the information about which relay nerve connects where
• Some impulses also go to the brain