Tag: sensory organs of humans - sense organs

Questions Related to sensory organs of humans - sense organs

Dynamic balance is maintained by

biology sensory organs of humans - sense organs ear : the organ of hearing and equilibrium ear and its function ear

  1. Maculae

  2. Cristae

  3. Organ of Corti

  4. Reissner's membrane

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Correct Option: B
Explanation:
Dynamic equilibrium is the maintenance of body position in response to sudden movements. The receptors for dynamic equilibrium are present in cristae of ampullae located at the ends of semi-circular canals. Sensory impulses are carried to brain through auditory nerves. The cerebellum of brain analyse the data and sends signals for proper balance.
So, the correct answer is 'Cristae'.

Sensory crista of ampulla of mammalian ear is connected with

biology sensory organs of humans - sense organs ear : the organ of hearing and equilibrium ear and its function ear

  1. Sense of balance

  2. Sense of low hearing

  3. Sense of loud hearing

  4. Secretion of ear wax

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Correct Option: A
Explanation:
The enlargement of one end of semi-circular canal is called ampulla. It is the swollen base of semi-circular canals which are a series of interconnected tubes or channels present in inner ear and form a part of bony labyrinth. They contain a fluid called endolymph. Ampulla contains a projecting ridge called crista ampullaris or crista. It contains sensory hair cells having cytoplasmic projections on the apical end called stereocilia. Crista contains receptors that sense movements in body and maintain dynamic equilibrium. Hence, it maintains balance of the body.
So, the correct answer is 'Sense of balance'.

The structures in a body that assist in body balance are located in

biology sensory organs of humans - sense organs ear : the organ of hearing and equilibrium ear and its function ear

  1. Middle ear

  2. Inner ear

  3. Eustchain tubes

  4. None of the above

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Correct Option: B
Explanation:
The inner ear (also called the labyrinth) contains 2 main structures — the cochlea, which is involved in hearing, and the vestibular system (consisting of the 3 semicircular canals, saccule, and utricle), which is responsible for maintaining balance. The structures in a body that assist in body balance are located in the inner ear are semicircular canals and the vestibule. These together help to maintain the balance and equilibrium of the body. 
So, the correct answer is 'Inner ear'.

Which of the following membranes given us the ability to different pitches of sound?

biology sensory organs of humans - sense organs ear : the organ of hearing and equilibrium ear and its function ear

  1. Membrane covering the round window

  2. Tympanic membrane

  3. Tectorial membrane

  4. Basilar membrane

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Correct Option: D
Explanation:

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.

So the correct option is 'Basilar membrane'.

Fill in the blank with correct option.
_________ db is the threshold of heating the faintest sound most of us can hear.

biology sensory organs of humans - sense organs ear : the organ of hearing and equilibrium ear and its function ear

  1. $0$

  2. $1$

  3. $2$

  4. None of the above

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Correct Option: A

Pitch of sound is determined by its 

biology sensory organs of humans - sense organs ear : the organ of hearing and equilibrium ear and its function ear

  1. Frequency

  2. Amplitude

  3. Speed

  4. Loudness

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Correct Option: B
Explanation:

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?

biology sensory organs of humans - sense organs ear : the organ of hearing and equilibrium ear and its function ear

  1. Round window

  2. Oval window

  3. Tympanic membrane

  4. Ear pinna

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Correct Option: A

Which of the following is an efficient organ for hearing in mammals?

biology sensory organs of humans - sense organs ear : the organ of hearing and equilibrium ear and its function ear

  1. Internal ossicles

  2. Malleus and incus

  3. Cochlea

  4. Corpus callosum

Show answer
Correct Option: C
Explanation:

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

biology sensory organs of humans - sense organs ear : the organ of hearing and equilibrium ear and its function ear

  1. 10 Hz to 80 Hz

  2. 50 Hz to 80 Hz

  3. 50Hz to 15000 Hz

  4. 15000 Hz and above

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Correct Option: C

Which structure helps a person to maintain his equilibrium?

biology sensory organs of humans - sense organs ear : the organ of hearing and equilibrium ear and its function ear

  1. Semicircular canals

  2. Cochlea

  3. Hammer

  4. Eustachian tube

Show answer
Correct Option: A
Explanation:

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.