Biology

• Hormone system = Chemical impulses
• Nervous system = Electrical impulses
• Glands are produced by hormones. Hormones are transported by blood
• 

Relflex Actions: In order

• Receptor- detects stimulus (pain)
• sensory neurone- transmits the impulse
• Relay neurone- passes the impulse on
• motor neurone- stimulated
• Impulse- sent to the effector (muscle/gland)
• Actin is taken (move etc.)

Chemicals transmit the impulse across a synapse