biology

biology
1 / 11
volgende
Slide 1: Tekstslide

In deze les zitten 11 slides, met interactieve quizzen en tekstslides.

Onderdelen in deze les

biology

Slide 1 - Tekstslide

Deze slide heeft geen instructies

the retina
= The light-sensitive layer 
-2 layers:
pigmented layer
neural layer
-2 cells:
rods 
cones




Slide 2 - Tekstslide

= The light-sensitive layer of tissue that lines the back of the eye
the retina exists of 2 layers:
pigmented layer
neural layer
   innermost layer of the eyeball
                    contains microscopic structures
                       rods
                       -low-light
                       -non-color vision
                    Cones
                       -Bright-light
                       -Color vision


function retina
-Light processing
-Photons are absorbed in rods and cones:
  • cones: fine detail, color
  • rods: not detailed, grayscale

Slide 3 - Tekstslide

function: Light processing starts at the back of the retina.
Photons are absorbed in rods or cone cells, which contain
chemicals called opsins that react when absorbing photons
of light.
the cones detect fine detail and color (very detailed)
rods only register a grayscale of black and white and shape
(not very detailed)

what are the 2 layers of the retina?
A
neural layer & green layer
B
pigmented layer & neural layer
C
pigmented layer & photoreceptor layer
D
photoreceptor layer & optic layer

Slide 4 - Quizvraag

Deze slide heeft geen instructies

what are the 2 cells in the innermost layer of the eyeball?
A
fibers & nerves
B
ganglion & bipolar cells
C
rods & nerves
D
rods & cones

Slide 5 - Quizvraag

Deze slide heeft geen instructies

long-sighted vision
long-sighted vision:
-medical term= hyperopia
-eyeball is too short
-You see better far away, and it’s blurry when it’s close
-it improves when you get older
- glasses/contact lenses
- symptoms: squinting eyes, tired eyes, headaches,...



Slide 6 - Tekstslide

It happens when the eyeball is too short
You see better far away, and it’s blurry when it’s close
Most children are born with farsighted vision, when you get older it improves
both are types of refractive errors (vision problem that makes it hard to see clearly)
both are easily corrected with eyeglasses or contact lenses
common signs and symptoms: squinting eyes to see clearly, tired eyes and eye rubbing, eye strain and headaches

near-sighted vision
near-sighted vision:
-medical term: myopia
-eyeball grows too long
-You see better when objects are closer
-gets worse during adolescence, then stabilizes
- glasses/contact lenses
-symptoms: squinting eyes, tired eyes, headaches,...

Slide 7 - Tekstslide

 (medical term: myopia): You see better when objects are closer
It happens when the eyeball grows too long from front to back
Nearsightedness: it gets worse during adolescence and then stabilizes during early adulthood
40% of Americans are nearsighted

How many procent of Americans are nearsighted?
A
10%
B
30%
C
20%
D
40%

Slide 8 - Quizvraag

Deze slide heeft geen instructies

what is a different word for hyperopia?

Slide 9 - Open vraag

Deze slide heeft geen instructies

ciliary muscle
= muscles that control the movement of the lens/pupil
-iris:
= colored part of the eye

Slide 10 - Tekstslide

= muscles that control the movement of the lens/pupil
iris = the colored part of the eye

photoreceptors
= the light sensing nerve cells 
located in the retina

Slide 11 - Tekstslide

the light sensing nerve cells (rods and cones)
located in the retina