1. 3/25/2013 Starter: 99 100 Communication Systems Notes connection/exit: Summarize your notes in a minimum of 4 to 5 sentences Practice/Application Paste Notes here when done 3/26/2013 Define the following: a. Nervous System b. Endocrine System Communication Systems Notes

2. 1. Starter 2. Nervous/Endocrine system notes 3. Exit

3. DateLecture/ Activity/ Lab Page 2/22-25 Heart Foldable 75-76 2/26 Digestive/Excretory Notes 77-78 2/27 Digestive/Excretory Vocabulary 79-80 2/28 Cells CBA Review 81-82 3/1 Digestive System Corp Letter 83-84 3/4-6 Digestive System Ws 85-86 3/6-8 Excretory System Ws and Lab 87-88 3/18 Body Systems Match 89-90 3/19 Integumentary Notes 91-92 3/20 Integumentary Diagram/Voc 93-94 3/21 Integumentary System Ws 95-96 3/22 Immune System Ws 97-98 3/25 Endocrine/Nervous Notes 99-100

4. 3/25/2013 Starter: 99 100 Communication Systems Notes connection/exit: Summarize your notes in a minimum of 4 to 5 sentences Practice/Application Paste Notes here when done 3/26/2013 Define the following: a. Nervous System b. Endocrine System Communication Systems Notes

6. Main Function: To control and coordinate functions throughout the body and respond to internal/ external stimuli. Our nervous system allows us to feel pain.

7. Consists of: brain, spinal cord, nerves and sense organs Sense Organs: Eyes, Skin, Ears, Nose & Tongue

8. A nerve is an organ containing a bundle of nerve cells called neurons, which carry electrical messages called impulses throughout the body. Picture shows hundreds of severed neuron axons

9. cell body muscle tissue TYPICAL MOTOR NEURON Axon dendrite synapse cell body

10. Because neurons never touch, chemical signalers called neurotransmitters must travel through the space called synapse between two neurons to help send messages. Neurotransmitters Synapse (gap) The message is transferred when RECEPTORS receive neurotrans- mitters. (pink spheres)

11. 1. Cell body: contains nucleus & most of the cytoplasm 2. Dendrites: projections that bring impulses into the neuron to the cell body. 3. Axon: long projection that carries impulses away from cell body 1 3 2

12. Sensory Neuron Interneuron Motor Neuron Sensory Neuron Interneuron Motor Neuron Muscle Contracts Synapse

13. Sensory Neuron carry impulses from sense organs to spinal cord & brain Fun Fact: Where can the largest cells in the world be found? The giraffe’s sensory and motor neurons! Some must bring impulses from the bottom of their legs to their spinal cord several meters away!!

14. Interneuron -processes impulses in brain and spinal cord - connect sensory and motor neurons

15. Motor Motor Neurons carry impulses from the brain & spinal cord to muscles & glands Axon End Axons branching out to muscle fibers

16. Nerves work together with muscles for movement. An impulse begins when one neuron is stimulated by another neuron or by the sense organs. The impulse travels down the axons of Sensory neurons to the brain cells called Interneurons. The brain will then send an impulse through motor neurons to the necessary muscle or organs, telling it to contract.

17. A reflex is an involuntary response that is processed in the spinal cord not the brain. Reflexes protect the body before the brain knows what is going on. Reflex Arc

18. brain Spinal Cord Cerebellum Cerebrum Medulla Oblongata Consists of: Brain and Spinal Cord

19. CerebrumVoluntary or conscious activities of the body-learning, judgment CerebellumCoordinates and balances the actions of the muscles Medulla Oblongata (Brain Stem) Controls involuntary actions like blood pressure, heart rate, breathing, and swallowing Spinal Cord The main communications link between the brain and the rest of the body

20. Consists of: all sensory neurons, motor neurons, and sense organs

21. 3/25/2013 Starter: 99 100 Communication Systems Notes connection/exit: Summarize your notes in a minimum of 4 to 5 sentences Practice/Application Paste Notes here when done 3/26/2013 Define the following: a. Nervous System b. Endocrine System Communication Systems Notes