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KINESIOL 1Y03 Lecture Notes - Lecture 21: Temporal Lobe, Microvillus, Resting Potential

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scarletspider676
20 Apr 2016
School
McMaster University
Department
Kinesiology
Course
KINESIOL 1Y03
Professor
Krista Howarth

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Document Summary

Sound waves: external auditory canal > tympanic membrane. Middle and external ear are air filled cavities. Oval window is an opening to inner ear a membrane covered opening (it is an entry point) Stapes (like your hand) bangs on oval window (like pool cover) (from air filled cavity > Round window membrane covered; acts as the exit point of sound waves from cochlea. Auditory (eustachian) tube connects middle ear to back of throat air from throat to middle ear. This is bc we want equal air pressure on either side of tympanic membrane. If you get fluid in middle ear, this interferes with functioning of the auditory ossicles (malleus, incus, stapes) > can"t hear as well. Inner ear is a space in temporal bone filled with membrane structures that create little cavities. 3 main regions: balance: vestibule, hearing: cochlea, balance: semicircular canals. These structures are fluid-filled but we want to separate the fluids.

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Related Questions

The ____________ ear consists of the ____________ that funnels sound waves, the external acoustic meatus, and the ____________ that vibrates like a drum when sound waves hit.

The ____________ ear consists of the air-filled chamber, called the ____________ , and ossicles called the ____________ that transmit sound vibrations to the oval window.

The ____________ , also called the pharyngotympanic tube, connects the middle ear to the pharynx to equalize the ____________ in the outer and middle ear.

The organ of equilibrium is the ____________ , and the organ of hearing is called the ____________ , which is a coiled snail-like tube; this structure converts sound waves to nerve impulses.

The inner ear also consists of tubes called the ____________ labyrinth that lines the bony labyrinth and is filled with ____________ , a similar fluid to intracellular fluid; the fluids are important in transmitting sound waves.