Grant is a College who loves to listen to very loud music. When is mother asks h
ID: 3520414 • Letter: G
Question
Grant is a College who loves to listen to very loud music. When is mother asks him to turn down the music down, Grant usually puts on his headphones instead of actually turning down the volume. During summer vacation Grant and his friends attended many concerts at the Hard Rock Café. One morning after an awesome concert, Grant did not wake up when his mother knocked on the door. He still did not wake up. Finally Grant opened the door when his mother clearly shrilled “Wake Up”. Grant told his Mom that he did not hear her knock, but did hear her yell. Did Grant really not hear her knock or was he just trying to get more sleep.Answer the Following Questions in order: Number each response.The submission must be in APA format. 1. The ear is composed of a series of transducers that convert air waves (vibrations) into nerve impulses that the brain interprets as sounds. (2pt)a. What is the amplitude of the sound wave that represents hearing?b. What is the frequency or the wavelength of the sound wave for human hearing?2. What cranial nerve associated with the ear? Describe its anatomy & physiology. (2pts)3. The ear is divided into three regions: outer, middle, and inner. Name the structures in each region and describe how each structure functions to convert vibrations in the air into messages that the brain interprets as sound. (9pts)4. The ear contains 2 types of fluid. Name and identify the location of these two fluids. (2pts)5. Grant says that he no longer hears the base guitar rhythm tracks on his MP3 player. (2pts)a. What part of the cochlear duct appears to be damaged?b. Why do you not suspect damage to the tympanic membrane? Case Study: Special Senses226. At one concert Grant and his friends dance and spun one another around until they felt dizzy. (4pt)a. Describe static equilibrium.b. What part of the ear detects static equilibrium?c. Describe dynamic equilibriumd. What part of the ear detects dynamic equilibrium?7. During the flight back to college, Grant experienced excruciating pain in his ears. Upon request the flight attendant brought him chewing gum to relieve the pain. Grant was surprised that chewing the gum relieved the pain. (4pt)a. What caused Grant’s pain?b. Was Grant’s pain related to the earlier problem? Explain.c. Explain why chewing the gum relieved the ear pain?d. Why would a child with ear tubes NOT suffer from ear pain during a flight in a pressurized air craft cabin.
Explanation / Answer
1. The ear is composed of a series of transducers that convert air waves (vibrations) into nerve impulses that the brain interprets as sounds. (2pt) a. What is the amplitude of the sound wave that represents hearing?b. What is the frequency or the wavelength of the sound wave for human hearing?
a. The sound waves of louder sounds have greater amplitude than those of softer sounds. For sound, volume is measured in decibels (dB). The softest sound that a human can hear is the zero point. Humans speak normally at 60 decibels.
b. Frequency is the number of waves per unit of time, and in sound is heard as pitch. High-frequency (?15.000Hz) sounds are higher-pitched (short wavelength) than low-frequency (long wavelengths; ?100Hz) sounds. Frequency is measured in cycles per second, and for sound, the most commonly used unit is hertz (Hz), or cycles per second. Most humans can perceive sounds with frequencies between 30 and 20,000 Hz
2 What cranial nerve associated with the ear? Describe its anatomy & physiology , 3The ear is divided into three regions: outer, middle, and inner. Name the structures in each region and describe how each structure functions to convert vibrations in the air into messages that the brain interprets as sound. 4. The ear contains 2 types of fluid. Name and identify the location of these two fluids.
Ans. The vestibulocochlear nerve (cranial nerve VIII) carries information about hearing and balance. The vestibulocochlear nerve also known as the auditory vestibular nerve .It consists of the cochlear nerve that carries information about hearing, and the vestibular nerve that carries information about balance.
The auditory system is comprised of three components; the outer, middle, and inner ear, all of which work together to transfer sounds from the environment to the brain.
OUTER EAR: The outer ear includes the pinna/auricle and the ear canal.
MIDDLE EAR: The middle ear is composed of the tympanic membrane and the cavity.
INNER EAR:The inner ear is composed of the sensory organ for hearing—the cochlea, as well as for balance—the vestibular system.
Vestibular or Balance System
The balance part of the ear is referred to as the vestibular apparatus. It is composed, in part, of three semicircular canals situated within the inner ear. The vestibular system helps to maintain balance, regardless of head position or gravity, in conjunction with eye movement and somatosensory input. The semicircular canals are innervated by the VIIIth cranial nerve.
Cochlea: The hearing part of the inner ear is the cochlea. The cochlea is spiral-shaped, similar to the shape of a snail.
PHYSIOLOGY OF HEARING
In the outer ear—air
In the middle ear— mechanical
In the inner ear liquid
To the brain— neural.
Vestibular systems semicircular canal
4. The ear contains 2 types of fluid. Name and identify the location of these two fluids.
a Endolymph is the fluid contained in the membranous labyrinth of the inner ear
b. Perilymph is connected to the cerebrospinal fluid that surrounds the brain and the spinal column.
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