Chapter 14, Problem 20MC

Label the parts of the eye:

The middle ear functions in _______. a. detecting shifts in body position b. amplifying and transmitting sound waves c. sorting sound waves out by frequency

Jill is diagnosed with sensorineural deafness, a disorder in which sound waves are transmitted normally to the inner ear but they are not translated into neural signals that travel to the brain. Sometimes the cause is a problem with the auditory nerve, but in Jills case it has to do with a problem in the inner ear itself. Where in the inner ear is the disruption most likely to be located?

Figure 36.14 Cochlear implants can restore hearing in people who have a nonfunctional cochlea The implant consists of a microphone that picks up sound. A speech processor selects sounds in the range of human speech, and a transmitter converts these sounds to electrical impulses, which are then sent to the auditory nerve. Which of the following types of hearing loss would not be restored by a cochlear implant? Hearing loss resulting from absence or loss of hair cells in the organ of Corti. Hearing loss resulting from an abnormal auditory nerve. Hearing loss resulting from fracture of the cochlea. Hearing loss resulting from damage to bones of the middle ear.

What are the stimuli for taste receptors?

Match each structure with its description. _____ cataract a. protects eyeball _____ cochlea b. transmits vibration to bone _____ eardrum c. functions in balance _____ lens d. detects pheromones _____ sclera e. interferes with vision _____ fovea f. contains chemoreceptors _____ taste bud g. focuses rays of light _____ Pacinian corpuscle h. has the most cones _____ pinna i. collects sound waves _____ vestibular apparatus j. sorts out sound waves _____ vomeronasal organ k. defects touch

SCIENCE, TECHNOLOGY, AND SOCIETY Cochlear implants bring hearing to many children who are born deaf. The prognosis is best when the device is implanted before the child is three years old (during the early years when language is developed). Many individuals in the deaf community (which consists of individuals born deaf or who are affected by deafness) who communicate with sign language oppose cochlear implants. They do not view the inability to hear as a disability. This perspective raises ethical questions for some families with children who are deaf. Argue for and against cochlear implants for very young children.