Flashcards
Unit 4.4 Hearing & Seeing
Flashcards do conjunto (20)
- 1Unit 4.4Hearing and Seeing
- 2wot does energy do in order for us to hearto hear a sound, its energy needs to be transmitted through your eardrum and delicate structures of the ears.
- 3wot happens to the sound wavesyour ears collect sound waves as they enter the outer ear and travel through the ear canal.
- 4wot does the vibration of the sound wave dothe vibration of the sound wave strikes the eardrum, causing the eardrum to vibrate.
- 5where does the vibration then move to?this vibration is then passed on to the three bones of the middle ear.
- 6wot does the movement of the bones cause?the movement of the bones of the middle ear set up vibrations in the fluid of the cochlea which is located in the inner ear.
- 7wot happens in the cochleait is in the cochlea that these vibrations are converted into the electrical impulses that your brain interprets as sound.
- 8wot r some reasons y ppl can have hearing disabilities-the ear canal is blocked with wax
-the middle ear is filled with fluid
-eardrum has been ruptured by a loud noise
- sensory cells of the ear have been damaged coz of loud noise
-a defect in the auditory nerve or tiny hairs of cochlea prevents sound being transmitted correctly to brain - 9wot has helped ppl with seriously damaged inner-ear to heara cochlear implant, a bionic ear
- 10structure of human eye
- 11define accommodationthe ability of the lens to change shape
- 12wot happens to the accommodation as we get olderthe lenses harden
- 13wots the scientific word for short-sightednessmyopia
- 14wots the scientific word for long-sightednesshyperopia
- 15myopia
- 16hyperopia
- 17wot r bifocals n graded lens used forused to c if a person has more than one type of vision problem
- 18y r they strongest at the bottom?so if a person looks down through this region to read, and looks straight through the lenses to focus on objects furthur away
- 19wot r contact lenses made ofhard plastic, or from water absorbing materials
- 20wots another treatment instead of glasses n contact lenseslaser surgery
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- FlashCards sobre Unit 4.4 Hearing & Seeing , criado por Hamideh Mirzad em 29-08-2017.
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- Hamideh Mirzad
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