L7 end Flashcards
Olfaction
Sense of smell, carried by olfactory nerve
Chemoreceptors
Detect chemical dissolved in nasal mucus (smell)
Gustation
Taste buds activated by saliva, sweet, sour, salty, bitter, unami (savory)
Vision
70% of sensory receptors found in eye
Pigmented layer
Absorbs light
Neural layer
Photoreceptors transduce light
Types of Photoreceptors
Rods and Cones
Rods
Low acuity, dim light, no color vision, Mainly peripheral
Cones
bright light, high acuity, color vision
Optic disc
Blind spot
Macula Lutea
Lateral to optic disc, contains fovea centrialis mostly cone
Peripheral Retina
Mostly rods, activated by dim light less acute vision
Pathway of light
Enters through cornea, aqueous humor, lens, vitreous humor, retina photoreceptors
Three regions of hearing
Outer ear, middle ear, and inner ear
Outer ear
Ear canal to tympanic membrane (eardrum)
Middle ear
Contains ossicles(small bones) that move when eardrum vibrates from soundwaves
Inner ear
contains Cochlea for hearing, vestibule and semicircular canals for equilibrium
Cochlea
Spiral chamber within ear, houses organ of corti (hearing)
Equilibruim
Composed of utricle, saccule, and semicircular canals, Involves vestibular apparatus in inner ear
Utricle and saccule detect ___
Static equilibrium and linear acceleration (moving in straight line)
Semicircular canals involve ___
Dynamic equilibrium
Mechanoreceptors are activated by
fluid motion from movement