Exam (elaborations)
PLTW Biomed 1.3 The Ear (1).
PLTW Biomed 1.3 The Ear (1).
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PLTW Biomed 1.3 The EarWhat is the pinna? - ANS-acts as a kind of funnel which assists in directing the sound further
into the ear
What is the auditory canal? - ANS-transmits sound from the pinna to the eardrum
What is the eustachian tube? - ANS-controls the pressure within the middle ear, making it equal
with the air pressure outside
the body
What are the ossicles? - ANS-form the coupling between the vibration of the eardrum and the
forces exerted on the
oval window of the inner ear
What is the tympanic membrane? - ANS-receives sound vibrations from the outer air and
transmits them to the
auditory ossicles, which are tiny bones in the tympanic (middle-ear) cavity
What is the cochlea? - ANS-transforms the vibrations of the cochlear liquids and associated
structures into a
neural signal
What are the sensory hair cells? - ANS-sensory receptors in the inner ear that detect sound and
head motion to
begin the processes of hearing and balance control
What is the cochlear nerve? - ANS-sensory nerve that transfers auditory information from the
cochlea (auditory
area of the inner ear) to the brain
What is the oval window? - ANS-membrane that is vibrated by the movement of the ossicles,
which causes fluid
in the cochlea to move
What is the vestibule? - ANS-contains structures that help you sense gravity and linear
acceleration, essential to
balance
What is the vestibular nerve? - ANS-transmits sensory information about balance and
equillibrium
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