The Nervous System
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Which receptor is stimulated by light?
Photoreceptors Ex. Rods and Cones
Which receptor is stimulated by chemicals?
Chemoreceptors Ex. Tastebuds
Which receptors are stimulated by pressure?
Mechanoreceptors Ex. Hair cells inside the ear
Which receptors are stimulated by temperature?
Thermoreceptors
What is the white outer layer of connective tissue in the eye?
The Sclera
What is the Job of the cornea?
To refract light into the eye
The middle layer of the eye that contains blood vessels?
The choroid layer
What is the coloured part of the eye?
The Iris
A transparent flexible disk behind the iris that helps light focus.
The lens
A small layer of fluid in the anterior cavity of the eye which provides oxygen to the cells of the lens and cornea.
The Aqueous Humour
A fluid that fills the posterior cavity and makes up most of the volume of the eye.
The Vitreous Humour
What is the inner layer of the eye called?
The retina
What is a bipolar cell?
A cell that transfers nerve impulses to ganglion cells
What is a ganglion cell?
A cell whose axons become the optic nerve which transfers impulses to the brain.
What does a rod do?
Sees shades of black and white as well as movement.
What does a cone do?
Responsible for colour vision and can be found in the retina.
What is a blind spot in the eye?
A place where light cannot be detected. Where the optic nerve attaches to the eye.
What is it called when light focuses in front of the retina?
Near sighted
What is it called when light focuses behind the retina?
Far sighted
What is an astigmatism?
When there is an uneven curvature of the cornea.
What is a cataract?
A cloudy film which covers the lens of the eye making vision blurry.
What is the pinna and where is it located?
The pinna is located on the outer ear and it is the visible skin which directs sound waves inwards.
What is the auditory canal and where is it located?
The auditory canal is located in the outer ear and it is a tube leading to the eardrum which sits in the middle ear. Hair and ear wax are located here.
What does the tympanic membrane (Eardrum) do and where is it located?
Located in the middle ear and converts sound vibrations into mechanical vibrations.