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PHS Biology
Eye and Ear Quizz
11
Biology
9th Grade
11/07/2011

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Cards

Term
Name the part of the eye that controls how much light enters it
Definition
iris
Term
What is the name of the hole in the middle of the eye?
Definition
pupil
Term
What happens to the size of the pupil in bright light?
Definition
gets smaller
Term
What happens to the size of the pupil in dim light?
Definition
gets larger
Term
What is the function of the optic nerve?
Definition
to carry impulses from the eye to the brain
Term
Which part of the eye does the light hit first?
Definition
the cornea
Term
What enables our judgement of sound direction to be accurate?
Definition
having two ears
Term
Why is the eardrum important?
Definition
transfers vibrations to the middle ear bones
Term
What is the function of the middle ear bones?
Definition
transfer vibrations to the cochlea
Term
Name the nerve that carries impulses from the ear to the brain
Definition
auditory nerve
Term
Why are the semi-circular canals important?
Definition
they allow us to balance
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