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Ears & Eyes
A & P
| Question | Answer |
|---|---|
| Astigmatism | Odd or irregular shaped lens or cornea |
| Cataracts | Irreversible and progessive clouding of the lens leading to blindness Caused by long-term exposure to ultraviolet light, radiation, certain diseases, ect. |
| Conjunctivitis | Inflammation or infection of the conjunctiva caused by viral pink eye |
| Myopia | Near-sightedness |
| Retina | Innermost layer Contains light sensitive receptors |
| Conjunctiva | thin, blook-rich transparent membrane covering the white portion of the eye and lining the eyelid |
| Choroid | thin layer of blood vessels between retina and sclera |
| Sclera | White of the eye Outer layer |
| Lacrimal Glands | Tear glands~slightly antimicrobial Upper portion of the eye |
| Auricle | Capture and funnel sound waves External appendages on each side of the head |
| Ceruminous Glands | Glands that produce ear wax |
| Tympanic Membrane | Elastic membrane that stretches over the internal end of the external auditory canal End of the inner portion of the external auditory canal |
| Middle Ear | begins on the inside of the tympanic membrane Contains Auditory Ossicles & Eustanchian tube |
| Auditory Ossicles | Three small bones: malleus incus stapes |
| Eustachian Tube | Connects the middle ear to the upper part of the pharynx Equalizes air pressure |
| Inner Ear | 3 areas: Vestibule Semicircular canals Cochlea |
| Vestibule | Collects sound vibrations from the middle ear to the inner ear |
| Semicircular Canals | Control balance, sense of body position, and equilibrium |
| Cochlea | Spiral-shaped hollow cone filled with fluid Picks up vibrations from stapes and transforms sound waves into electrical signals for the brain |
| Organ of Corti | Within Cochlea Contains sensitive hair cells that converts sound waves into nerve impulses |
| Acoustic Nerve | The Otic Nerve and the Vestiular Nerve Connects the inside of the inner ear to the brain |
| Mydriasis | When a radial (dilator) muscles contracts on the iris and the pupil dilates |
| Miosis | When the iris's sphincter (circular) muscles contract and shrink the pupil |
| Focal Point | Retina |
| Accommodation | Ability of the lens to change shape in order to focus on objects at various distance |
| Rods | Responsible for non-color vision under dim light conditions and sense motion |
| Cones | Perceieve colors (red, green, blue) |
| Where are cones and rods located? | Retina |
| Lacrimation | Liquid product of a process Main purpose is to clean and lubricate |
| Lysozyme | Natural substance in tears that fights off infection |
| Punctum | Tiny ducts that ten to twenty percent of tears are forced into via blinking |
| Nasolacrimal Duct | Tears go through from the Punctum to the Nasal Cavity |
| What does the horizontal canal detect? | Head movements, such as turning the head or doing a spin |
| What is the fluid inside the Semi-circular canals? | Endolymph |
| Provides proctection and assist in the lubrication of the eye | Eyelids |
| Lies over the white portion of the eye and lines the eyelid | Conjunctiva |
Created by:
lacythecoolest
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