LO6 Sensory System Flashcards
What does the lens do
Bends the light into focus on the retina
What does the iris do
Controls the diameter and size of the pupil and amount of light let in
What does the pupil do
Let’s light into eye
What does the retina do
Converts light into electrical signals
What does the optic nerves do
Turns electrical signals into images in your brain
What does the cornea do
Let’s light through to the kens and begins focusing on
What does the suspensory ligaments do
Holds lens into place
What does the ciliary muscles do
Pulls the lens for focusing
Why is it bad for too much light into the eye
Damage to light sensitive cells
Why is it bad for too little light into the eye
Not enough to stimulus the cells
What works together to focus on images on the retina
Cornea and lens
Where does refraction happen the most in the eyes
Cornea
What is the lens made out of
Elastic fibres and are attached to suspensory ligaments to facilitate these changes
What shape is the lens when focusing on something far away and more or less fluid
Thic and more fluid
What shape is the lens when focusing on something close and more or less fluid
Thin and less fluid
What collects sound
The outer ear (pinna) but the ear canal collects sound waves
what thin piece of skin vibrates
ear drum
what are the three tiny bones called
hammer, anvil, stippup
what connect to the nerve
cochlea hair (cilia)
what’s the outer ear
pinna and eardrum
what is the middle ear
ossicle
what is the inner ear
cochlea hairs
what is the cochlea
looks like a snail filled with liquid and hairs with censored by the noise and is turned into electrical impulses
what happens to energy in the earth
sound energy enters the ear and converted into electrical signals
what is the semi- circular canals
helps your balance due to being full of liquid and it moves around and moves tiny hairs in each canals
what is the amphllae
when turning your head the inner ear turns along with it but takes a moment for the fluid in the semi-circular canal and the ampullae moves with it
