5015129
Question 1
Question
The otic placode appears in the 3rd week of development at 22 days. The Otic vesicle appears between the 4th and 5th week of development.
Answer
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Both true
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First true, second false
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First false, second true
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Both false
Question 2
Question
Which of the following is incorrectly matched?
Answer
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The ventral otocyst becomes the saccule and cochlear duct
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The dorsal otocyst becomes the utricle, semicircular canals, and endolymphatic duct
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The mesenchyme of the cochlear duct forms cartilage
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The inner ridge forms the hair cells
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None of the above
Question 3
Question
Which of the following is incorrect?
Answer
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The tympanic cavity and auditory tube are from the first pharyngeal pouch
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The incus and malleus are from the first pharyngeal arch
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The external auditory meatus is from the first pharyngeal cleft
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The auricle comes from the first pharyngeal cleft
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The stapes come from the 2nd pharyngeal arch
Question 4
Question
The inner layer of the optic cup forms the pigment of the retina and the outer layer forms the neural layer. The optic cup forms from the choroid fissure.
Answer
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Both statements true.
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First true, second false
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First false, second true
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Both false
Question 5
Question
The sphinctor and dilator pupillae muscles develop from the mesoderm of the optic cup. The iris develops from the tip of the optic cup
Answer
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Both true
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First true, second false
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First false, second true
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Both false
Question 6
Question
SHH represses PAX2 at the midline and positively regulates PAX6. PAX2 regulates eye development, PAX6 regulates optic stalk differentiation
Answer
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Both true
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First true, second false
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First false, second true
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Both false
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