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Ch.8 Vocab
| Question | Answer |
|---|---|
| Conjunctiva | secretes mucus to lubricate eye |
| Lacrimal Glands | production of tears, protects, moistens and lubricates the eye |
| Lysozyme | a protein in lacrimal fluids (Tears) |
| sclera | outer layer of eye, white connective tissue layer |
| cornea | middle layer of eye, no blood vessels, repairs itself |
| choroid | inner layer of eye, pigments prevent light scattering |
| ciliary body | smooth muscle attached to lens |
| ciliary zonule | holds lens in place and helps it change shape for focusing |
| iris | regulates light entering the eye |
| pupil | controls the amount of light entering the eye |
| retina | detects light and sends visual signals to the brain |
| photoreceptors | detect light and convert it into neural signals for vision |
| rods | detects black, white, low light and night vision |
| cones | detects color and detail in bright light |
| optic disk | where no photo receptors exist, blood vessels and exons exit eye cavity forming optic nerve |
| fovea cenralis | sharp central vision and detailed sight, only cones |
| cataracts | clouding of the eyes lens, blurred vision |
| scleral venous sinus | drains excess aqueous humor from eye to maintain intraocular pressure |
| glaucoma | increased intraocular pressure damaging the optic nerve and lead to vision loss |
| refracted light | light that bounces off a surface and changes direction |
| accommodation | lens must change shape to focus on closer objects |
| convergence | viewing close objects causes this (eye turning medially) |
| photopupillary reflex | bright light causes pupils to constrict |
| accommodation reflex | viewing close objects causes pupils to constrict |
| emmetropia | eye focuses images correctly on the retina |
| myopia | nearsighted, distant objects appear blurry |
| hyperopia | farsighted, near objects are blurry |
| presbyopia | aging causes the lens of the eye to become less squishy |
| astigmatism | causes by weird shaped cornea or lens, blurred or distorted vision |
| mechanoreceptors | detect pressure, touch, vibration and stretch |
| otitis media | infection or inflammation of the middle ear, causes pain, hearing loss and fluid buildup |
| ossicles | amplify sound waves, transmit sound waves from eardrum to inner ear, conduct sound waves through lever-like movements |
| osseus labyrinth | helps with balance and equilibrium, all bones in ear |
| tectorial membrane | supports hair cells that convert sound vibrations into electrical signals, amplifies and enhances sound frequency detection |
| perilymph | clear fluid surrounding inner ear membranous labyrinth, helps maintain the inner ears structure and function |
| membranous labyrinth | detects sound and maintains balance by sensing movement and changes in the head |
| endolymph | inside the membranous labyrinth, helps detect sound and balance by stimulating sensory hair cells |
| static equilibrium | sense of maintaining head and body position when still, detected by the otolith organs in the inner ear |
| dynamic equilibrium | sense of detecting head movement and rotation, facilitated by the semicircular canals in the inner ear |
| otoliths | tiny ear stones, float in a gel around hair cells, tilting of head causes them to shake |
| basilar membrane | supports hair cells, convert sound vibrations into nerve signals |
| chemoreceptors | detect chemical stimuli, such as odors, tastes, and changes in blood chemistry |
| olfactory receptors | in roof of nasal cavity, long cilia |
| olfactory hairs | stimulated, impulses are sent up through the __, cell body, filiments and bulbs |
| papillae | provide friction for moving food materials around the mouth for proper swollowing |
| basal cells | regenerate and replace other cells, such as in the skin and sensory organs |
Created by:
ashgerz13