The Senses Flashcards
(42 cards)
What does the skin sense?
Contains receptors for pain, touch and temperature
Describe taste.
- Receptors for taste located in taste buds
- Four basic tastes, sweet, sour, bitter, salt
- Umami (MSG)
Describe smell.
- Root of nasal cavity has millions of receptors to detect smell
- 10,000 different smells
What are the five traditional senses?
- Touch
- Smell
- Taste
- Sight
- Hearing
How is balance detected?
By the vestibular apparatus in the inner ear.
What is the conjunctiva?
Is the membrane around the eye, it protects the eye.
What is the sclera?
A tough, white coat that holds the eye in place
What is the cornea?
Is the front, clear part of the sclera. Allows light into the eye and bends it to help focus it on the retina
What is the choroid?
Nourishes the eye and prevents internal reflection of light
What is the retina?
Is light sensitive. Contains light receptors, rods for black and white, and cones for colour vision
What conditions does cones best work in?
In bright light
What is the fovea?
The part of the retina where most images are focused.
What is the blind spot?
Where the optic nerve leaves the retina. Has no rods or cones
What is the lens?
Focuses light onto the retina.
What is the optic nerve?
Carries impulses to the brain
What is the iris?
The coloured part of the eye. It controls the amount of light entering the eye.
What is the pupil?
The black circle at the front of the eye, it lets light into the eye
What are the ciliary muscles?
They change the shape of the lens called accommodation to focus light on the retina
What do the aqueous and vitreous humours do?
They keep the eye in shape
What does the ear do?
Its the organ of hearing and balance
What does the pinna do?
Collects vibrations
What does the auditory canal do?
Carries vibrations to the eardrum
What does the eardrum do?
Carries vibrations to the middle ear
What is the ossicles?
The hammer, anvil and stirrup bones
They amplify the virbrations and pass them on to the cochlea in the inner ear
