5.3 vision

• Biologie
• Middelbare school
• vwo
• Leerjaar 1

5.3 vision

Senses or response

Stimuli

look for food

ear

throwing up

tongue

catch a ball

listening music

smell parfum

see fire works

Feeling thirsty

What are stimuli and impulses

1. A stimulus is something that sensory organs take in. Impulses are signals in the nerves
2. An impulse is something that sensory organs take in. Stimuli are signals in the nerves
3. They are both something taken in by sensory organs
4. They are both signals in your nerves

MOST IMPORTANT STEPS OF THIS CHAPTER:

coordinator

effector

stimuli

receptor

response

... convert stimuli into electrical signals to which your body can respond.

1. nerve impulses
2. sensory receptors
3. neurons
4. effectors

Lesson plan

• Questions (prior knowledge)
  
• Explanation 5.3
•  Work on 5.3: exercise: 9-12 

The eye

Notes

• Eyebrow (wenkbrauw): Protects the eye against sweat and other liquids (vloeistoffen)

• Eyelashes (wimpers): protects the eye against dirt and bright light

• Sclera (harde oogvlies): white of the eye. The eye muscles are attached to the sclera

• Pupil: The pupil lets light into the eye.

eyelid

tearduct

tear gland

eyebrow

eyelash

Pupil reflex

Pupil gets smaller in bright light

Pupil gets bigger in dim light

iris

retina

sclera

cornea

pupil

optic nerve

lens

https:

retina

Cones are for: Color (red / blue / green)

Rods are for: Light (black / white)

retina

cones work well in bright light

rods function in dim light

the fovea is the most sensitive part (lots of cones)

retina

retina

blind spot/optic nerve

kidshealth.org

https:

(-) minus lenses

(+) plus lenses

glasses

- short - sightedness: you can’t see sharp in the distance, you need - (concave) glasses, your eye is too long, or your lenze can’t flatten enough

- long - sightedness: you can’t see sharp up close, you need + (convex) glasses, your eye is too short, or your lenze can’t contract enough

kidshealth.org

Which part of the eye is responsible for converting light into electrical signals?

1. Cornea
2. Retina
3. Optic Nerve
4. Choroid

What is the name of the part of the eye that controls the size of the pupil?

1. Sclera
2. Cornea
3. Retina
4. Iris

What do we
call this reflex?

1. Light reflex
2. Iris reflex
3. Pupil reflex
4. Light protection

Lesson plan

• Questions (prior knowledge)
  
• Explanation 5.3
•  Work on 5.3: exercise: 9-12 

Homework for tomorrow: study 5.3 + do exercises 5.3 + finish wordlist