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Using your prior knowledge EXPLAIN in multiple sentences how the game “Simon Says” works?
Homeostasis: RegulationHow does the nervous system help us maintain homeostasis?
The game Simon says works because ______________________________
HINT ->
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How does the nervous system maintain homeostasis? The stable internal
balance of an organism that ensures survival
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The process in which an organism controls and coordinates all its activities
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•Responsible for regulation
•Control and coordinates by sending messages.
•Consists of :
BrainSpinal CordNerves
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How does your brain work?
This cartoon is implying that ____________________________________________________________________________
Homeostasis: Regulation
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These circles are not moving, your brain is making them appear to move. Try focusing
on one circle. It will stop moving.
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•The control center•Protected by the skull
•Made up of approx. 1 trillion neurons•Divided into two
hemispheres
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Right
Left •Each hemisphere controls the opposite part of the body.Ex. The Left hemisphere
controls that right side of the body
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Look at the chart and say the color, NOT the word
Your right brain tried to say the color,
but your left brain was reading the word.
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A look inside!!!!
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The brain consists of three major
parts:
1.Cerebrum
2.Cerebellum
3.Medulla oblongata
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•The largest part of the brain•Located on both the right and left hemisphere
•The center for thought, memory, learning, senses and voluntary movements.
activity
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Read this sign
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•Located below and behind the cerebrum•Coordinates all motor activities
•Maintains the body’s balance
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Located at the base of the brain and spinal cord
Controls involuntary actionsSuch activities include __________________________________________
Heart rateBreathing rate
Peristalsis
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If a human system fails to function properly, what is the most likely
result?
1. a stable rate of metabolism 2. a disturbance in homeostasis 3. a change in the method of cellular
respiration 4. a change in the function of DNA
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Two types of human cells are shown in the diagram below.
Cell A causes the cells at B to contract. This activity
would be most useful for1. lifting a book from a bookshelf 2. coordinating the functions of organelles 3. digesting food in the small intestine 4. carrying out the process of protein synthesis
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CEREBRUM
CEREBELLUM
MEDULLA
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Two types of human cells are shown in the diagram below.
Cell A causes the cells at B to contract. This activity
would be most useful for1. lifting a book from a bookshelf 2. coordinating the functions of organelles 3. digesting food in the small intestine 4. carrying out the process of protein synthesis
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If a human system fails to function properly, what is the most likely result?
1. a stable rate of metabolism 2. a disturbance in homeostasis 3. a change in the method of cellular
respiration 4. a change in the function of DNA
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Does this image appear to be moving?
• It’s NOT!
• Just kidding, this one is actually moving
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Final Summary
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Homework:Homework: Nervous system Handout
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Imagine you’ve stepped off a curb and a car doing 70 mph,
comes out of nowhere. Identify 2 human body
systems at work to help you respond to this stimuli. How do they work together to help you maintain homeostasis???
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•A cluster of nerves that run along the back
•Protected by the
______________ Vertebrae (backbone)
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A group of nerve cells (neurons) that carries the
messages known as impulses.
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Structural unit of the brain and
nervous system which conduct
information and carry messages throughout an
organism.
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How do we relay the How do we relay the messages messages
throughout our throughout our bodies to produce an bodies to produce an
action?action?
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Topic: Nervous SystemTopic: Nervous SystemAIM: How do nerve impulses AIM: How do nerve impulses reach an adjacent nerve cell?reach an adjacent nerve cell?
DO NOW:DO NOW:Identify the 3
sections of the brain
describe their function
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Specialized structures that are sensitive to stimuli
physical or chemical changes within or outside an organism that cause a response
Ex. Eyes, ears, skin, nose
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Specialized structure that responds to commands of the
nervous system Ex.Ex. Muscles, Glands, Organs
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• One microscopic nerve cell• Basic unit of the
nervous system
•There are 100 billion neurons in the brain
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3 Types of
Neurons• Found in receptors
(sense organs) • Receive stimulus • Send impulses
from receptors to the spinal
cord and brain.
1. Sensory Neurons:
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• Found in the spinal cord & brain.
• Receive impulses from sensory neurons
• Interpret “process” stimulus
• Send response command to the motor neurons
2. 2. Inter-NeuronsInter-Neurons:
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• Receives the impulses from the inter-neuron,
• Sends response impulse to the effectors.
3. 3. Motor NeuronsMotor Neurons:
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Involuntary sequence of events starting from the stimulus until there is a
response.
tester
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Gap/space between the axon terminals of one neuron and the dendrites of the next
S Y N A P S E
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Neurotransmitters Chemical messengers that send the impulse across the synapse
Examples:1.acetylcholine2.Dopamine
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