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Transcript of 3/25/2013 Starter: 99 100 Communication Systems Notes connection/exit: Summarize your notes in a...
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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
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March 25, 2013
AGENDA Objective 7.12 B Identify the main functions of the systems of the human organism, including the circulatory, respiratory, skeletal, muscular, digestive, excretory, reproductive, integumentary, nervous, and endocrine systems by completing endocrine/nervous system notes
1. Starter2. Nervous/Endocrine system notes3. Exit
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Table of Contents
Date Lecture/ Activity/ Lab Page2/22-25 Heart Foldable 75-762/26 Digestive/Excretory Notes 77-782/27 Digestive/Excretory Vocabulary 79-
802/28 Cells CBA Review 81-823/1 Digestive System Corp Letter 83-843/4-6 Digestive System Ws 85-863/6-8 Excretory System Ws and Lab 87-883/18 Body Systems Match 89-903/19 Integumentary Notes 91-923/20 Integumentary Diagram/Voc 93-943/21 Integumentary System Ws 95-963/22 Immune System Ws 97-983/25 Endocrine/Nervous Notes 99-
100
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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
![Page 5: 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.](https://reader036.fdocuments.in/reader036/viewer/2022062516/56649e0e5503460f94af8a50/html5/thumbnails/5.jpg)
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Main Function: To control and
coordinate functions throughout the body
and respond to internal/ external
stimuli.
Our nervous system allows us to feel pain.
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Consists of: brain, spinal cord, nerves and sense organs
Sense Organs: Eyes, Skin, Ears, Nose & Tongue
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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
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cellbody
muscle tissue
TYPICAL MOTOR NEURON
Axondendrite
synapse
cell body
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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.
(pinkspheres)
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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
Parts of a Neuron
1
32
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Sensory
Neuron
Interneuron
Motor Neuron
Sensory Neuron
Interneuron
Motor Neuron
Muscle Contracts
Synapse
Synapse
Synapse
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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!!
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Interneuron
-processes impulses in brain and spinal cord
- connect sensory and motor neurons
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Motor Neurons
carry impulses from the brain & spinal cord to muscles &
glandsAxon End
Axons branching out to muscle
fibers
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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.
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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
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brain
Spinal Cord
Cerebellum
Cerebrum
Medulla Oblongata
Consists of: Brain and Spinal Cord
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Cerebrum Voluntary or conscious activities of the body-learning, judgment
Cerebellum Coordinates and balances the actions of the muscles
Medulla Oblongata (Brain Stem)
Controls involuntary actions like blood pressure, heart rate, breathing, and swallowing
Spinal CordThe main communications link
between the brain and the rest of the body
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Consists of:
all sensory neurons,
motor neurons,
and sense organs
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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