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Y2_T3_LSN_3.4+3.5
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Slide 1 - Diapositive
Topic 3
ORGANIZING THE WORLD
Slide 2 - Diapositive
Plan for today
Explanation T3.4 The nervous system
5 minute break
Explanation T3.5 The spinal cord
Make homework
Slide 3 - Diapositive
3.4 The Nervous system
Slide 4 - Diapositive
Learning goals
I can....
explain the function of the nervous system
describe the components of the central nervous system
explain the process wherein the nervous system detects information from the environment and reacts to it
describe the functions of the three different types of
neurons
Slide 5 - Diapositive
Key words
Nervous system
Brain
Spinal cord
Central Nervous system
Peripheral nervous system
Stimulus
Receptor cells
Impulse
Coordinator
Effector
Response
Neurons
Sensory neurons
Interneurons
Motor neurones
Slide 6 - Diapositive
Your nervous system
Your nervous system is your bodies fast communication system:
Your
CNS
- Central nervous system (control system)
Your
PNS
- Peripheral nervous system (routers)
Slide 7 - Diapositive
Signals
When your body observes stimuli from it's environment, the following cycle happens:
PNS - Your body receives a stimuli (senses)
CNS - Your brain/spinal cord coordinates a response.
PNS - Muscles / glands create a response
Slide 8 - Diapositive
Neurones - Wires
Our body has 3 types of neurones:
sensory neurones
- connects senses to the CNS
interneurones
- the neurones within the CNS
motor neurones
- connects the CNS to the effectors
Slide 9 - Diapositive
5 minute break
timer
5:00
Slide 10 - Diapositive
3.5 The Spinal Cord
Slide 11 - Diapositive
Learning goals
I can....
explain how reflexes are different than a normal nervous system response.
follow the chain of events that take place during a reflex arc.
explain how impulses are passed from one neuron to the next.
explain the function of neurotransmitters in spreading impulses.
describe how drugs can connect to receptors and disturb impulses.
Slide 12 - Diapositive
Key words
Reflexes
Spinal cord
Synapses
Vesicles
Neurotransmitters
Slide 13 - Diapositive
Reflexes
A
reflex
is also a response of your body, but then using your spinal cord as a coordinator instead of a your brain:
this is often used in cases of emergency
Slide 14 - Diapositive
Synapses
Synapses
are connections in your nervous system that use chemicals in stead of electricity:
synapses work with a chemical called
neurotransmitters
the bag that holds the neurotransmitter is called a
vessicle
Slide 15 - Diapositive
Homework
Study the glossary of 3.4 & 3.5
Complete the exercises of 3.4 (p. 136-141)
Complete the exercises of 3.5 (p.144-151)
Next week = review lesson
Week after = presentations
timer
10:00
Slide 16 - Diapositive
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