TOPIC: The Nervous System AIM: How does the Nervous System help maintain Homeostasis?

1. TOPIC: The Nervous SystemAIM: How does the Nervous System help maintain Homeostasis? HW: TEXT BOOK READ PAGES 558-562. Do Vocabulary Definitions for words on page 558

2. Background Information Neuron = a nerve cell Impulse = messages sent by nerve cells Voluntary = have conscious control over Involuntary = do not have conscious control over

3. What is the function of the Nervous System? Life Function associated with the Nervous system is REGULATION. A system that conducts impulses to CONTROL and COORDINATE body activities.

4. Organization of Nervous System Nerves, which make up nervous systems, are organized in the following way…

5. Nervous System: Peripheral Nervous system Central Nervous System Autonomic Nervous System Somatic Nervous System Sympathetic Division Parasympathetic Division

6. Central Nervous System (CNS) What are the components of the CNS and How do they work together to maintain homeostasis? Components: Brain and Spinal Cord Send, receive, and process messages from the Peripheral NS

7. Peripheral Nervous System (PNS) What are the components of the PNS and How do they work together to maintain homeostasis? Nerves that connect the CNS with the rest of an organism’s body.

8. Information Processing:Typical Nerve Pathway Sensory input Integration (brain analyzes) Motor output

9. Somatic Nervous System What are the components of the Somatic NS and How do they work together to maintain homeostasis? Nerves that regulate voluntary functions.

10. Autonomic Nervous System (ANS) What are the components of the Automatic NS and How do they work together to maintain homeostasis? Nerves that control all involuntary functions

11. Sympathetic Division How does the Sympathetic Division regulate body activities? Slows down body functions Rest and Digest!!

12. Parasympathetic Division By speeding up body activities Fight or flight How does the Parasympathetic Division regulate body activities?

13. Information Processing:Typical Nerve Pathway Sensory input Integration (brain analyzes) Motor output

14. How does the Nervous system function to maintain Homeostasis? Answer on separate sheet of loose leaf and leave on desk upon Exit.

15. TOPIC: NERVOUS SYSTEMAim: How does a neuron conduct an impulse? HW: Page 552 in Text Book Vocabulary Definitions Do Now: Handout: Vocabulary Map: NUERON

16. General Neuron Axon Dendrites Myelin sheath Cyton Synaptic terminal Axon Terminals Synapse

17. YouTube - The Human Body: Nervous System (2nd Ed., Rev.) (clip)

18. Vocabulary: Parts of a Neuron Dendrites: Receive impulses and direct them toward the cyton. Cyton: Cell Body – conducts impulses from dendrites to axon Axon: Transmits impulses from cyton to terminal branches at Synapse.

19. Parts continued Myelin Sheath: Fatty covering on Axon that helps speed up impulse conduction. Axon Terminals: Where the axon ends and the neurotransmitters are secreted.

20. THE SYNAPSE

21. YouTube - Neural Synapse

22. The Synapse: Gap Between neurons The following occurs at the synapse: Neurotransmitters are secreted from axon terminals to transmit impulses across the synapse to the dendrites of the next neuron.

23. Neurotransmitters Handout: Activity - Synapse Chemicals secreted to transmit impulses across a synapse. They have specific shapes and only receptors of the same shape will accept them.

25. TOPIC: NERVOUS SYSTEMAIM: How do different types of neurons function to conduct impulses?

26. Three types of neurons • Sensory • Inter or Associative • Motor • Handout for Notes

27. Sensory Neurons: Transmit impulses from your senses into the CNS. Where are Sensory Neurons located? In the CNS or PNS?

28. Inter Neurons: Associative Neurons Process impulses from the sensory neurons and send impulses to the motor neurons. between Where are Inter neurons located?

29. Motor Neurons Transmit impulses from the Inter neurons to the muscles, glands, or organs that will be producing the response. Where are the Motor Neurons located? NEW VOCAB WORD: EFFECTOR The muscles, glands, or organs producing the response.

32. YouTube - Central Nervous System, Reflex Arc

33. On Loose Leaf HW: Worksheet Describe the path of an impulse through the three types of neurons. What is the difference between a regular reaction and a reflex?

34. Review MovieSource: The Nervous System

35. TOPIC: Nervous SystemAIM: How do the parts of the Brain help maintain homeostasis? DO Now: Worksheet HW: STUDY FOR QUEST on Nervous System and Midterm Finish Flip Books

36. The Cerebrum • The Cerebrum Controls all voluntary activities. • These include: movement, speaking and language, memory, and senses. Characteristics: * Largest part of the Brain * Divided into hemispheres (Right & Left)

37. The Cerebellum Second largest part of the Brain. The Cerebellum regulates Balance and Coordination of movements.

38. The Medulla Also known as the BRAINSTEM It becomes continuous with the spinal cord Regulates all Involuntary Activities such as heart rate, breathing rate, etc.

39. Video Clip : The story of Phineus Gage Phineus Gage

40. Nervous System Diseases and Disorders Schizophrenia Depression Alzheimer’s Disease Parkinson’s Disease