Tag: ear
Questions Related to ear
Dynamic balance is maintained by
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Maculae
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Cristae
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Organ of Corti
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Reissner's membrane
Sensory crista of ampulla of mammalian ear is connected with
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Sense of balance
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Sense of low hearing
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Sense of loud hearing
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Secretion of ear wax
The structures in a body that assist in body balance are located in
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Middle ear
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Inner ear
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Eustchain tubes
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None of the above
Which of the following membranes given us the ability to different pitches of sound?
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Membrane covering the round window
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Tympanic membrane
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Tectorial membrane
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Basilar membrane
The human ear can detect a wide range of frequencies, from the low rumbles of distant thunder to the high-pitched whine of a mosquito. The sensory cells that detect these sounds are called hair cells, named for the hair-like strands that cluster on their tops. Hair cells are spread across a flat surface called the basilar membrane, which is rolled like a carpet and tucked into a snail shell-shaped structure in the inner ear called the cochlea. Each of our roughly 16,000 hair cells is dedicated to a narrow frequency range. These cells are ordered along the basilar membrane according to the frequencies they detect.
Fill in the blank with correct option.
_________ db is the threshold of heating the faintest sound most of us can hear.
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$0$
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$1$
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$2$
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None of the above
Pitch of sound is determined by its
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Frequency
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Amplitude
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Speed
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Loudness
The amplitude is the SI unit of the pitch of the sound. So, the correct option is "Amplitude".
The membrane that gives us the ability to discriminate different pitches of sound is?
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Round window
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Oval window
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Tympanic membrane
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Ear pinna
Which of the following is an efficient organ for hearing in mammals?
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Internal ossicles
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Malleus and incus
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Cochlea
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Corpus callosum
The Cochlea is the auditory portion of the inner ear. It is a spiral-shaped cavity in the bony labyrinth, in humans making 2.5 turns around its axis, the modiolus.
Thus, the correct answer is option C.
The range of normal human hearing is in the range of
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10 Hz to 80 Hz
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50 Hz to 80 Hz
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50Hz to 15000 Hz
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15000 Hz and above
Which structure helps a person to maintain his equilibrium?
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Semicircular canals
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Cochlea
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Hammer
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Eustachian tube
The inner ear consists of two systems of canals which are namely cochlea and vestibular apparatus. The vestibular apparatus consists of three semicircular canals, cristae and two sacs called as saccule and utricle. Cochlea is the organ of hearing which contain mechanoreceptors for hearing. This makes option B incorrect. The three semicircular canals lie at right angle to each other in vestibular apparatus of inner ear and are filled with endolymph; this arrangement senses the change in movement (acceleration or deceleration) or position and maintain equilibrium. The mechanism includes movement of cupula in response to movement of endolymph within the canal causing the bending of cilia to generate the nerve impulse. This makes option A correct. Hammer is the one of the three ossicles of the middle ear which is concerned with amplification of air pressure while passing it from the inner surface of tympanic membrane via incus to stapes. This makes option C incorrect. The eustachian tube extends from each middle ear to nasopharynx and permits the equalization of air pressure. This makes option D incorrect. Correct answer is A.