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Chap 16 part 2

Horizontales
Three _______ components of the eyeball 3 layers(tunics) that form the wall of the eyeball Optic components admit and focus light Neural component: retina and optic nerve
__________ apparatus: holds receptors for equilibrium
Equilibrium with the perception of the orientation of the head when the body is stationary
Transport mucous membrane that lines eyelids and covers anterior surface of eyeball, except cornea Richly innervated and vascular(heals quickly) Secretes a thin mucous film that prevents drying
Acceleration that change in rate of rotation
Coordination, balance, and orientation in 3 dimensional space
Equilibrium-in car, linear acceleration detected as otoliths lag behind, bending the stereocilia and stimulating the hair cells
Enhance facial expression, protects eyes from glare and perspiration
3 semicircular ducts- detect rotational/angular acceleration -Receptors: cristae and cupula
Each ampulla contains ____________- hair cells and supporting cells in a mound of gelatinous membrane called the cupula
Each duct is filled with endolymph and opens up as a dilated sac(________) next to the utricle
Macular receptors
Equilibrium that when head is tilted, heavy otolithic membrane sags, bending the stereocilia and stimulating the hair cells
Tears flow through opening on eyelid edge to lacrimal sac, then into nasolacrimal duct emptying into ______________
CN 6 innervates lateral rectus
Verticales
______ flows in>>>>depolarization>>>>> release of neurotransmitter>>>>> generates action potential in the cochlear nerve
Glands that secrete oil that reduces tear evaporation
Perception of objects in the environment by means of light they emit or reflect
Muscles: Superior, inferior, lateral, medial rectus muscles Superior and inferior oblique muscles
Detect static equilibrium and linear acceleration
Apparatus that makes, distributes and drains tears. Tears from ________ gland wash and lubricate eye, deliver oxygen and nutrients, prevent infection
Tallest stereocilium is bent when __________ membrane rises up toward tectorial membrane>>>>open mechanically gated ion channels
As ______ turns, endolymph lags behind, pushes cupula, stimulates hair cells
Block foreign objects, help with sleep, blink to moisten
Equilibrium with the perception of motion or acceleration
Innervates other four extrinsic muscles
Help keep debris from eye
Direction of bending of stereocilia determines impulse frequency and nerve impules
CN 4 innervates superior oblique
Acceleration that change in velocity in a straight line(elevator)
Visible electromagnetic radiation human limited to wavelengths of 400 to 700 nm Must cause a photochemical reaction to produce a nerve signal
Superior, inferior, medial, and lateral rectus muscles move the eye __, ____, medially, and laterally(respectively)
Superior and inferior oblique muscles turn the "twelve o'clock pole" of each eye toward or away from the nose