1. Animal Science Nervous System

2. Co-Ordination Adjustments of an animal’s response to changes in the environment Require complex linking of various systems Nervous & Endocrine –1 st operates via electrical impulses –2 nd releases chemicals or hormones

3. Sensory Function Sense changes both outside and within the body Example: Eyes sense change in light

4. INTEGRATIVE FUNCTION Processing the information received form the sense organs Impulses are analyzed and stored as memory Impulses are sorted, synchronized, and co- ordinated and the proper response is initiated

5. Motor Function Response to the stimuli that causes muscles to contract Example: Fancy foot work with a soccer ball

6. Motor Function Continuous Tasks Performance level is just as proficient as before even after years of no use. Example: ? Discrete Tasks Performance level drops but will still be better than a new learner. Example: ?

7. Neuron

8. Neurons are cells that have been adapted to carry nerve impulses

9. Neurons transmit high-speed signals called nerve impulses. Nerve impulses are similar to an electric current.

10. Dendrites-conduct nerve impulses towards the cell body Axon-carries the impulses away from it Myelin-fatty material around the sheath Axons & Myelins speeds up the rate at which the nerve impulses travel along the nerve

11. Cell body of neurons located in brain or spinal cord Axons extend to the organ that it supplies Nerve-bundle of axons

13. Types of Neurons Sensory Neuron-nerve cell that transmits impulses from a sense receptor Motor Neuron-nerve cell that transmits impulses from the brain or spinal cord to a muscle or gland Relay Neuron-connects sensory and motor neurons

14. Connections Between Neurons Connection between neurons=synapse Neurotransmitters are chemicals that are in the gap between the neurons When the neurotransmitters contact the membrane of the adjacent neuron they stimulate a NEW nerve impulse

15. Reflexes Reflex-rapid automatic response to stimulus Reflex arc-path taken by the nerve impulses

16. Follow Me… The stimulus (pin in the paw) stimulates the pain receptors in the skin This initiates an impulse in a sensory neuron Impulse travels to the spinal cord Impulse passes(by means of a synapse) to a connecting neuron called the relay neuron Relay makes a synapse with one or more motor neurons that transmit the impulse to the muscles. Causes muscles to contract and remove the paw

17. Got it?

18. HOW DO ANIMALS MOVE?ANIMALS