第九章单元测试
- The retina （ ）
- The optic disc （ ）
- The structure that allows air pressure in the middle ear to be equalized with outside air pressure is （ ）
- About the tympanic membrane, which of the following descriptions is not correct? （ ）
- About the auditory tube, which of the following descriptions is not correct? （ ）
A:the optic disc located in the blind part B:the blind part lines the internal surface of the choroid C:it can be divided into the optic part and the blind part D:it is completely composed of neurons E:the optic part lines the internal surface of the ciliary body
答案:it can be divided into the optic part and the blind part
A:lies lateral to the mecula lutea B:located in the bland part of the retina C:is sensitive to the light D:fovea centralis is its center E:is formed by the optic nerve pierces the retina
A:oval window B:auditory tube C:mastoid air D:mastoid sinus E:cochlear duct
A:Functionally, the tympanic membrane regenerates the vibrations of sound source. B:The lower 3/4 of the tympanic membrane is called the tense part. C:The tympanic membrane and the second tympanic membrane are the same in function. D:The tympanic membrane is obliquely placed, facing downward, forward, and laterally. E:The upper 1/4 of the membrane is called the flaccid part.
A:The auditory tube is a canal connecting the tympanic cavity to the nasopharynx B:In a child, the auditory tube is shorter and relatively wider. C:Its posterior third is bony, and its anterior two thirds is cartilaginous. D:The medial 2/3 of the tube is supported by bone. E:It functions to balance the pressures on both sides of the tympanic membrane.
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