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3.2 Seeing
Chapter 3: Observing
3.2 Seeing
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Biologie
Middelbare school
havo, vwo
Leerjaar 1
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Chapter 3: Observing
3.2 Seeing
Slide 1 - Slide
Schedule today
Welcome
Learning objectives
Check knowledge 3.1
Check knowledge 3.2 (the eye)
Instruction
Homework
End of class
Slide 2 - Slide
Learning objectives
You will learn
- how your eyes are constructed
- how you are able to see colours
- how you control the amount of light in your eyes
- how your eyes are able to focus
- how you see depth.
Slide 3 - Slide
Translate:
Prikkel
A
Sense
B
Stimuli
C
Impulse
D
Neuron
Slide 4 - Quiz
Translate:
Sense
A
Reageren
B
Ruiken
C
Zintuig
D
Prikkel
Slide 5 - Quiz
Wat is a sensory organ?
A
A change in the environment
B
Electrical signals that travel through the nerves to the brain
C
An organ that can sense stimuli and convert them into impulses
D
The processing of impulses from the environment
Slide 6 - Quiz
What is a stimulus?
A
Something you feel when you touch a sharp object.
B
Information from your surroundings.
C
A signal that's being transported through the body.
D
A part of the central nervous system.
Slide 7 - Quiz
A stimulus can be picked up by a sensory organ. Then it is being converted into an impulse. What is an impulse?
A
A chemical reaction of the body.
B
An electrical signal.
C
The same as a stimulus.
Slide 8 - Quiz
What are senses of heat?
A
Senses that are hot.
B
Senses that get hot when you use them.
C
Senses that percieve heat.
D
Senses that only operate during the summer.
Slide 9 - Quiz
Check knowledge 3.2
Do you already know all the parts of the eye?
Slide 10 - Slide
eyelid
tearduct
tear gland
eyebrow
eyelash
Slide 11 - Drag question
Eyebrow
Eyelashes
Tear fluid
Eyelid
sweat and other moisture runs past your eyes and not in them
protects against dirt and excessively bright light
protects against dehydration and cleans the eye
can close as a protective layer over your eye
Slide 12 - Drag question
Lens
Iris
Cornea
Eye muscle
Choroid
Retina
Fovea
Blind spot
Optic nerve
Sclera
Vitreous body
Slide 13 - Drag question
Slide 14 - Slide
The outside of the eyes
Slide 15 - Slide
Slide 16 - Video
Slide 17 - Video
Slide 18 - Slide
Rods and cones
Rods (Staafjes)
: Black, white, grey
- work during nighttime
Cones (Kegeltjes)
: colours
- work during daytime
- Three types: Red, green, blue
Slide 19 - Slide
Pupillary reflex (pupilreflex)
= enlarging the pupils in dim light and making the pupils smaller in bright light.
Slide 20 - Slide
Accomodating (accomoderen)
Accomodating
= Making the eye lens more convex (bol) or flat (plat).
Ciliary muscle (straallichaam)
= A muscle surrounding the eye lens.
Lens is attached to
suspensory ligaments
(lensbandjes).
Slide 21 - Slide
Slide 22 - Slide
Glasses
accomodating or eyeball length
Far sighted (Verziend):
Short eyeball, only clear vision of distant objects.
Short-sighted (Bijziend):
Long eyeball, only clear vision of nearby objects.
Slide 23 - Slide
What?
check homework
Finish 3.2! --> This is homework!
12, 13, 16-18, 20, 23, 24, 28
How?
In your workbook. Use the information from your textbook.
Help?
You may gently consult with your neighbor. Raise your hand if the two of you can't figure it out.
Time?
15 minutes
Finished?
Study the PIF or write a summary of 3.2.
Product
You have practiced 3.2!
Slide 24 - Slide
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