Ten Question - Anatomy Of Ear
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External ear. The anatomy of ear the most best complicated anatomy. . Read it and relish b4 seeing the questions. .
- 1.
External auditory canal developd from ??
- A.
First branchial groove
- B.
2nd branchial groove
- C.
3rd branchial groove
- D.
None of the above
- E.
Al of the above
Correct Answer
A. First branchial grooveExplanation
The external auditory canal develops from the first branchial groove. The branchial grooves are structures that form during embryonic development and eventually give rise to various structures in the head and neck region. The first branchial groove specifically gives rise to the external auditory canal, which is the passage that leads from the outer ear to the middle ear. Therefore, the correct answer is the first branchial groove.Rate this question:
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- 2.
Santorini fissure seen in?
- A.
Cartilagenous EAC
- B.
Bony EAC
- C.
Bony cartilagenous junction of EAC
- D.
Near tm
Correct Answer
A. Cartilagenous EACExplanation
The Santorini fissure is seen in the cartilaginous external auditory canal (EAC). The EAC is divided into two parts - the cartilaginous portion and the bony portion. The Santorini fissure is a small groove or cleft that is present in the cartilaginous portion of the EAC. It is important to note that the Santorini fissure is not seen in the bony EAC or the bony cartilaginous junction of the EAC. Additionally, it is not located near the tympanic membrane (TM). Therefore, the correct answer is the cartilaginous EAC.Rate this question:
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- 3.
True about pars flacida
- A.
Medial to it notch of rinivus
- B.
Its more mobile
- C.
It lacks fibrous layer
- D.
None
- E.
All
Correct Answer
E. AllExplanation
The pars flacida is a part of the tympanic membrane located in the ear. It is true that it is medial to the notch of the ring of the tympanic membrane, meaning it is positioned closer to the center. Additionally, the pars flacida is more mobile compared to the rest of the tympanic membrane. It lacks a fibrous layer, which is a characteristic feature of the pars flaccida. Therefore, the correct answer is "all" as all the statements are true about the pars flacida.Rate this question:
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- 4.
Tegmen tympani is formed from which part of temporal bone
- A.
Squamous
- B.
Petrous
- C.
Tympanic
- D.
Mastoid
- E.
Both a and b
Correct Answer(s)
A. Squamous
E. Both a and bExplanation
The tegmen tympani is formed from both the squamous and petrous parts of the temporal bone. The squamous part forms the superior portion of the tegmen tympani, while the petrous part forms the inferior portion. Therefore, the correct answer is "both a and b" as both the squamous and petrous parts contribute to the formation of the tegmen tympani.Rate this question:
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- 5.
Processus cochleariformis contaions
- A.
Stapedius tendon
- B.
Apex of cochlea
- C.
Tensor tympni tendon
- D.
Semi circular canal bulge
Correct Answer
C. Tensor tympni tendonExplanation
The correct answer is "tensor tympani tendon." The processus cochleariformis is a bony projection in the middle ear that contains the tensor tympani muscle. This muscle is responsible for dampening the sound vibrations that enter the ear, protecting the delicate structures of the inner ear from loud noises. The stapedius tendon is associated with the stapedius muscle, which also helps in reducing sound transmission. The apex of the cochlea is the furthest point of the spiral-shaped cochlea, and the semicircular canal bulge is a protrusion in the semicircular canals, which are responsible for detecting head movements and maintaining balance.Rate this question:
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- 6.
During swallowing which muscle helps in opening the ET
- A.
Levator palati
- B.
Tensor palati
- C.
Tensor tympani
- D.
Stapedius muscle
Correct Answer
B. Tensor palatiExplanation
The tensor palati muscle helps in opening the Eustachian tube during swallowing. This muscle is responsible for the movement of the soft palate, which in turn helps to equalize the pressure between the middle ear and the throat. When we swallow, the tensor palati muscle contracts, allowing the Eustachian tube to open and air to flow into the middle ear, equalizing the pressure. This prevents discomfort and potential damage to the ear.Rate this question:
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- 7.
Three semicircular canal opens into vestibule by ----------- openings
- A.
3
- B.
4
- C.
5
- D.
6
Correct Answer
C. 5Explanation
The three semicircular canals open into the vestibule through five openings.Rate this question:
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- 8.
Ductus reuniens connects
- A.
Cocjlea with ampulla
- B.
Cochlea with utricle
- C.
Utricle and saccule
- D.
None of the above
Correct Answer
C. Utricle and sacculeExplanation
The ductus reuniens connects the utricle and saccule.Rate this question:
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- 9.
Stapedius is supplied by
- A.
CN 7
- B.
CN 6
- C.
CN 5
- D.
Has dual nerve supply
Correct Answer
A. CN 7Explanation
The stapedius muscle is supplied by the facial nerve (CN 7). This muscle plays a crucial role in dampening sounds and protecting the inner ear from loud noises. When the facial nerve is stimulated, it causes the stapedius muscle to contract, which in turn reduces the movement of the stapes bone in the middle ear. This helps to reduce the transmission of sound vibrations to the inner ear, preventing potential damage. Therefore, the correct answer is CN 7.Rate this question:
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- 10.
Orgam of corti located over
- A.
Tectorial membrane
- B.
Secondary TM
- C.
Basilaar membrane
- D.
Reissner membrane
Correct Answer
C. Basilaar membraneExplanation
The basilar membrane is located over the organ of Corti. It is a thin, flexible membrane that runs along the length of the cochlea and separates the scala media from the scala tympani. The organ of Corti, which is responsible for converting sound vibrations into electrical signals, sits on top of the basilar membrane. As sound waves enter the cochlea, they cause the basilar membrane to vibrate, which in turn stimulates the hair cells in the organ of Corti, leading to the perception of sound.Rate this question:
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Sep 01, 2023Quiz Edited by
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Feb 01, 2010Quiz Created by
Ranjithsharma
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