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 ->
How does the nervous system maintain homeostasis? The stable internal
balance of an organism that ensures survival
The process in which an organism controls and coordinates all its activities
•Responsible for regulation
•Control and coordinates by sending messages.
•Consists of :
BrainSpinal CordNerves
How does your brain work?
This cartoon is implying that ____________________________________________________________________________
Homeostasis: Regulation
These circles are not moving, your brain is making them appear to move. Try focusing
on one circle. It will stop moving.
•The control center•Protected by the skull
•Made up of approx. 1 trillion neurons•Divided into two
hemispheres
Right
Left •Each hemisphere controls the opposite part of the body.Ex. The Left hemisphere
controls that right side of the body
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.
A look inside!!!!
The brain consists of three major
parts:
1.Cerebrum
2.Cerebellum
3.Medulla oblongata
•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
Read this sign
•Located below and behind the cerebrum•Coordinates all motor activities
•Maintains the body’s balance
Located at the base of the brain and spinal cord
Controls involuntary actionsSuch activities include __________________________________________
Heart rateBreathing rate
Peristalsis
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
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
CEREBRUM
CEREBELLUM
MEDULLA
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
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
Does this image appear to be moving?
• It’s NOT!
• Just kidding, this one is actually moving
Final Summary
Homework:Homework: Nervous system Handout
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???
•A cluster of nerves that run along the back
•Protected by the
______________ Vertebrae (backbone)
A group of nerve cells (neurons) that carries the
messages known as impulses.
Structural unit of the brain and
nervous system which conduct
information and carry messages throughout an
organism.
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?
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
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
Specialized structure that responds to commands of the
nervous system Ex.Ex. Muscles, Glands, Organs
• One microscopic nerve cell• Basic unit of the
nervous system
•There are 100 billion neurons in the brain
3 Types of
Neurons• Found in receptors
(sense organs) • Receive stimulus • Send impulses
from receptors to the spinal
cord and brain.
1. Sensory Neurons:
• 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:
• Receives the impulses from the inter-neuron,
• Sends response impulse to the effectors.
3. 3. Motor NeuronsMotor Neurons:
Involuntary sequence of events starting from the stimulus until there is a
response.
tester
Gap/space between the axon terminals of one neuron and the dendrites of the next
S Y N A P S E
Neurotransmitters Chemical messengers that send the impulse across the synapse
Examples:1.acetylcholine2.Dopamine
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