1. Fill-in 1 2. 3 4 5 6 7. 8. 9. 10. 11. 12. 13. 14. 15 16. equilibrium. would not work well, if at all. 5. The sensory patch in the utricle's lining is called the run with atmospheric air pressure. 8. The auditory ossicles are joined to one another with _type joints 9. The has a flat, plug-like portion that fits into the oval window 10. Both the oval window and the _window are on the boundary of the middle and inner ear. 11. During sound reception, the tectorial membrane vibrates and stimulates the hair cells in the _? 12. The ? is the most external portion of the external car. 13. They amplify sound waves by as much as 20 times their original intensity. 15. The semicircular canals have sensory structures for the sense of 16. The maculae of the vestibular sensory regions are covered with gelatinous material. _? _are embedded in thin material. Copge 2019 y er c.Il ed
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C. Hearing (True-False) 1. Sound waves may reach the cochlea through the skull bones as well as via the tympanic membrane. 2. The more hair cells sending impulses, the louder will be the sound sensation. 3. Pitch is determined by the part of the basilar membrane that is activated. 4. Bending of the hair cells causes the formation of impulses. 5. There is no cure for conduction deafness, but nerve deafness may often be corrected. D. Equilibrium Select the structures described by the statements below. ampulla otoliths crista ampullaris saccule macula utricle 1. Two portions of the membranous labyrinth containing sensory receptors for static equilibrium. 2. Sensory hair cells in ampullae of semicircular canals. 3. Hair cells stimulated by the movement of the otoliths. 4. Hair cells stimulated by the force of endolymph. 5. Sensory receptors for dynamic equilibrium. 6. Enlarged base of a semicircular canal. 7. Calcium carbonate crystals. E. Hearing Tests Record your results of the hearing tests. Rinne Test Left ear Right ear
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Sound waves hitting the eardrum set it into vibration. Trace the pathway through which vibrations and fluid currents travel to finally stimulate the hair cells in the spiral organ of Corti. Name the appropriate ear structures in their correct sequence. eardrum ossicles oval window cochlea hair cells Complete the following description of the static and dynamic equilibrium receptors by writing the key choices in the answer blanks. KEY CHOICES: angular gravity semicircular canals cupula perilymph static dynamic proprioception utricle endolymph saccule vision The receptors for (1) equilibrium are found in the crista ampullaris of the (2). These receptors respond to changes in (3) motion. When motion begins, the (4) fluid lags behind and the (5) is bent, which excites the hair cells. When the motion stops suddenly, the fluid flows in the opposite direction and again stimulates the hair cells. The receptors for (6) equilibrium are found in the maculae of the (7) and (8). These receptors report on the position of the head in space. Tiny stones found in a gel overlying the hair cells roll in response to the pull of (9). As they roll, the gel moves and tugs on the hair cells, exciting them. Besides the equilibrium receptors of the inner ear, the senses of (10) and (11) are also important in helping maintain equilibrium.
Adi S.
The sour taste results when H+ ions cause depolarization by: 1) entering cell directly through channels, 2) binding to gated channels and preventing other ions from leaving, or 3) opening channels for other positive ions. When a person cannot see objects in the temporal halves of the visual fields, it is known as hemianopsia and may indicate a pituitary tumor. The bony core of the cochlea is the modiolus. Indicate whether each statement is true or false. 1. The spiral organ contains supporting epithelial cells and specialized sensory cells called hair cells. True False 2. The outer row of outer hair cells is primarily responsible for hearing. True False 3. The inner row of hair cells is involved in regulating the tension of the basilar membrane. True False 4. The tips of the outer hair cells are embedded within an acellular, gelatinous shelf called the tectorial membrane. True False
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