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Lesson_7_The_Senses - Dr Pamela ande or BME 5005 ‘ Vlslon...

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Unformatted text preview: Dr Pamela ande or BME 5005 ‘ Vlslon Sf}; stem conta1ns a receptor that 15 able to sense a change 1n the env1ronn1ent, associated With a nerve which will relay the information to the CNS. changes 1n chemicals in the mouth. Our brains recognize this as the sense of taste. no. mmmmmuw Stimulus Receptor energy membrane Receptor cel! Vesicle containing chemical messenger Copyrlght Q The MoGraw-Hlll Companies. Inc. Parmlssiun requlrad fur reproduction or dlsplay. _LLL|J_|_lLIJJlL|JJiLlJJfl|J1flHlHJJ1fl|Jfllll|IIIIIIIIIH|l|lfllfl 53 EE 3 Pressure (mini-lg) 40 mmHg 140 mmHg 180 mmHg Light. pres-sure Painful pressure aActlon potentials _ 1 C _ the sensor neuron that goes to the brain. Mn Walks Lehman. he. Salt Intarneurans . .receptor's neurons Increasing mines: I Increasing aaltiness mum; Long-m. 1m. .011 r, _. are frequent actlon p0tent1als.. ngem 1 S send Heat Light Pain Cold (Hair) Light Epidermls Strong pressure strokmg/brushmg(ha1r) {1} Receptor cell at rest {2} Fluid moving In (3) Fluid moving In one dlrootlon other direction Mm Walcr Lungmm. Inc. - In mmuwuum. Membranous discs containing visual pigments Mum Wesley Lung-Mn. Inc. Retina Pholmceptors . reach the photoreceptor cells _ iDrection ofit ' : before the Signal IS “311811111;th in Directi°n°fsi9“a' the opposite direction! - pun-she. ' minim mumumdmmwam Outerea Midd'eea '“r‘erea _ are passed alogfn thruh three. small middle ear bones: the malleus, incus and stapes. -pyny-u - Her Hll , put-uric. monmoubrnpndwflmordlpllp (2) Middle ear bones (3) Membrane in oval window moves Cochlear duct ' _ (4) Basilar membrane moves To E 2‘ .3 ' “a 3 (U E c i- (n 3-? LIJ filrther the ane moves along the cochlea, the lower pitch of sound we hear. Semicircular - canals ‘ Sensory neurons mww-y Lehman. Inc Llht IS sense b rods an ones in the retina ' Sound is perceived by the cochlea ° Balance is sensed. by the semicircular canals in the ear ...
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