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30 Cards in this Set
- Front
- Back
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Sensory System |
Afferent, sends Ns receives info about External environment (exteroception), internal environment (interoception), and position and movement of body (proprioception) |
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Sensation |
Conscious perception of sensory stimuli |
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Somatosenation |
Pain, touch, temp, and proprioception |
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Taste |
(gustation) tongue and pharynx |
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Smell |
Olfaction- nose |
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Sight |
vision- eye |
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Hearing |
Audition- ear |
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Equilibrium |
Vestibular Sensation- ear |
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Two functions of the ear |
Hearing- cochlea Balance and equilibrium- semi-circular canals (angular acceleration) and Utricle+Saccule (linear acceleration |
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External Ear |
Pinna/Auricle, Funnels sound waves, External acoustic/ auditory canal (vertical and horizontal), modifies skin with sebaceous and ceruminous glands, ends in tympanic membrane |
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Middle Ear |
(air-filled space) Tympanic cavity, lined by mucous membrane, it's closed to external acoustic canal by tympanic membrane, contains three ossicles |
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Ossicles |
Malleus- attaches to tympanic membrane and connected to the incus (hammer) Incus- Connected to the stapes (anvil) Stapes- footplate attaches to oval window of inner eat where it creates oscillations (stirrup) |
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Inner Ear |
(fluid- filled space) housed within temporal bone, detects sound and acceleration of head, multichambered membranous sac/ membranous labyrinth (system of fluid-filled sacs and ducts/ endolymph), in temporal bone |
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Membranous Labyrinth parts |
Cochlear duct (spiral)- audition Utricle and saccule (two enlargements) - linear acceleration Semicircular Ducts (three loops)- angular accerleration |
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Three tunics of Eyeball |
Fibrous, Vascular, And nervous |
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Fibrous |
outermost, sclera, and cornea |
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Vascular |
Middle layer, choroid, ciliary body, and iris |
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Nervous Tunic |
inner layer, retina |
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Cornea |
Entry point of light, transparent (lack of pigment/ vascular elements, relative dehydration of collagenous tissue, smooth optical surface, laminar pattern of collagen) Nocturnal animals have larger corneas to increase light transmission |
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Dogs VS Cats cornea/ sclera |
Dogs- 17% cornea + 83% Sclera Cats- 30% Cornea + 70% Sclera |
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Aqueous Humor |
Fills up ant. chamber, formed behind iris (post. chamber) |
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Vitreous humor |
behind lens, aqueous humor can flow into vitreous body |
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Retina |
Photoreceptors- Rods and Cones, Axons exit into optic nerve (blind spot: no photoreceptors) |
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Rods |
Black and white, high in domestic animals |
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Cones |
Color, high in birds |
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Adaptation to light |
ratio of cornea VS Sclera, increased concentration of rhodopsin, diameter of pupil, and presence of tapetum lucidum in choroid |
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cerumen |
ear wax |
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nasopharynx |
puts air in middle ear |
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Eye Movement |
Done by seven muscles that attach to fibrous tunic (sclera) --> transersly cornea |
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posterior chamber of eye |
behind iris, production site of aqueous humour, produced daily absorbed in iridocorneal angle (filtration angle) |
