Upgrade to remove ads
bio 211 ch16 Lec/ hearing
Terms in this set (35)
Cartilaginous part of the ear ; protects entry way and directs sound waves
External Auditory Meatus
ear wax ; produced by the ceruminous glands
Eardrum ; transmits sound energy into the inner ear
Air-filled space containing auditory ossicles
Passage extending from middle ear to nasopharynx ; Equalizes pressure on either side of tympanic membrane.
Malleus, Incus, Stapes ; Amplifies sound waves and transmits them to the oval window.
Attached to Tympanic Membrane ; Resembles a hammer shape
Middle ossicle ; resembling an anvil
Resembles "stirrup" ; Have foot plate fitting into oval window.
Hard, outer shell filled with perilymph.
Membrane lined fluid filled tubes within bony labyrinth ; contains endolymph and receptors for hearing and equilibrium.
Snail shaped chamber of inner ear ; houses membranous cochlear duct.
Cochlear duct (Scala media)
Membranous labyrinth in cochlea
Forms the roof of the cochlear duct
Forms floor of cochlear duct
Superior chamber of bony labyrinth
Inferior chamber of bony labyrinth
Spiral Organ (of Corti)
Hearing receptor within cochlear duct
Receptors that release neurotransmitter to sensory neurons ; Contain many stereocilia and one kinocilium.
Where are the Stereocilia and Kinocilium embedded?
- Sound waves vibrate tympanic membrane
- Ossicles vibrate and transmit waves to oval window
-Fluid pressure waves in Scala Vestibuli push vestibular membrane, causing pressure waves in endolymph of cochlear duct
-Specific regions of basilar membrane move (depending on sound wave frequency)
-Hair cells distort causing changes in neruotransmitter release
-Sensory neurons with axons in CN VIII (8) are stimulated to fire.
-Pressure is transmitted to Scala Tympani and absorbed by round window
Explain how a sound wave turns into a nerve signal
Depends on frequency of vibrating object
Rate of vibration in hertz
Stiff basilar membrane near oval window
Where do high frequency sounds excite cells?
Flexible basilar membrane near apex
Where do low frequency sounds excite cells?
Depends on wave amplitude ; louder sounds create larger movement of basilar membrane
-Stimulated hair cells send signals along cochlear branch to medulla oblongata
-Signals continue to the midbrain (inferior colliculus) and thalamus
-Conscious perception of sound in generated at the primary auditory cortex (temporal lobe)
Explain the auditory pathway
Interference of wave transmission in external or middle ear
Malfunction in inner ear or cochlear nerve
Awareness and monitoring of head position ; monitored by vestibular apparatus
Static Equilibrium and linear acceleration
What do the Utricle and Saccule detect?
Dynamic Equilibrium and angular acceleration
What do the semicircular ducts detect?
Receptor for static equilibrium and linear acceleration ; located in Utricle and Saccule
Gelatinous material containing calcium carbonate crystals called otolith
Recommended textbook explanations
Anatomy And Physiology Coloring Workbook A Complete Study Guide
Elaine Nicpon Marieb
Anatomy & Physiology: The Unity of Form and Function
Christina A. Gan, Heather N. Cushman, Kenneth Saladin
Hole's Essentials of Human Anatomy & Physiology
David N. Shier, Jackie L. Butler, Ricki Lewis
Bundle: Human Physiology: From Cells To Systems, 9Th Student Edition Mindtap (1-Year Access)
Sets found in the same folder
ex29 Blood LAB
Systemic and Pulmonary Circuit (Pulmonar…
Chapter 28 Reproductive Objectives
Ch. 29 Pregnancy questions
Sets with similar terms
The Special Senses of Hearing and Equilibrium
Other sets by this creator
Chapter 7 Values, Ethics, and Legal Issues
Nur 102: Chapter 35 Comfort and Pain Management
Nur 102: Chapter 34 Rest and Sleep
Nur 102: Chapter 25: Mobility key terms, NUR 102 C…