2. Cerebrum Controls conscious decision, personality, memory and creativity. Cerebellum Controls balance and coordinates muscle movement Medulla Connects brain to spinal cord. Controls breathing rate and heart beat. Hypothalamus and Pituitary Hypothalamus is a monitoring centre (e.g. water balance, temperature). The pituitary gland releases regulating hormones (e.g ADH).

4. The Nervous System Brain, spinal cord and nerve fibres communicating with sense organs, muscles, glands and internal organs

5. Central nervous System (CNS): Brain and spinal cord, protected by skull and vertebrae. Peripheral Nervous System: Nerves that spread to every part of the body and connect with sense receptors, skin, muscle and internal organs.

8. Sensory neurons Carry information from sense organs to CNS. Motor neurons Carry information from CNS to muscles and glands. Relay neurons Connect neurones. Receive info from sensory neurones and transmit to motor neurones.

9. Sensory neurons Carry information from sense organs to CNS. Receptor Sensory fibre Axon fibre Cell body with nucleus Impulses to CNS

10. Relay neurons Connect neurones. Receive information from sensory neurones and transmit to motor neurones. Impulses from sensory neurone Impulses to other neurones Cell body with nucleus Main relay fibre

11. Motor neurons Carry information from CNS to muscles and glands. Effector: Muscle or gland Cell body with nucleus Axon fibre Impulses from CNS

14. Sense Organs Light information Chemicals in air Chemicals in food Sound information Temperature, pressure, touch and pain.

15. Flow of Information Receptor cells in your nose detect a pungent smell. The brain processes this as unpleasant (possibly dangerous). You choose to move. Muscles in you legs move you away from the smell. Receptors CNS Effectors

18. Reflex Arc Animation