听觉是如何从声波变成大脑信号的？
How does a sound wave become a brain signal?
声波震动鼓膜，经听小骨放大传到耳蜗，毛细胞把机械振动转为电信号，再沿听神经送入大脑的听觉中枢。
Sound vibrates the eardrum, the ossicles amplify it to the cochlea, hair cells convert vibration into electrical signals, and the auditory nerve carries them to the brain.
难度 专业 · 适合 高中(15-18)
CC BY 4.0 · 已核验 · Verified 2026-11-03
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Kandel 等《神经科学原理》（Principles of Neural Science）听觉系统章节
Kandel et al., Principles of Neural Science (auditory system chapter)
独立核验依据 · Independent verification: 核验依据 1 ISBN 9787111430810（豆瓣书目条目: 神经科学原理）
#听觉 #耳蜗 #神经
耳朵除了听声音还负责什么？
Besides hearing, what do ears do?
内耳的前庭系统感知头部位置和运动，帮助维持平衡；所以耳朵出问题有时会让人头晕。
The inner-ear vestibular system senses head position and motion to keep you balanced; that's why ear trouble can cause dizziness.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 3 条独立证据
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Guyton 与 Hall《医学生理学》（Textbook of Medical Physiology）前庭系统章节
Guyton and Hall, Textbook of Medical Physiology (vestibular system chapter)
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-0-323-59712-8 · 核验依据 2 ISBN 978-1-4557-4377-3 (3rd ed., Elsevier) · 核验依据 3 ISBN 978-1-319-45541-5 (8th ed., Macmillan Learning)
#耳朵 #平衡 #前庭
为什么长时间看近处会加深近视？
Why does prolonged near work worsen nearsightedness?
持续近距离用眼使睫状肌紧张、眼球可能拉长，物像落在视网膜前形成近视；增加户外光照有助于延缓进展。
Sustained close work keeps the focusing muscle tense and may elongate the eye, placing images in front of the retina (myopia); more outdoor light helps slow progression.
难度 进阶 · 适合 大众
CC BY 4.0 · 来源待核验 · Source pending review
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出处备注：此条未指向带版次的可引用著作（通识性内容、机构文件或未展开的英文书名），本库不提供独立书目出处；如需精确引用，需由编辑补全具体篇目与版次。
Morgan C, Sculley K, Saw A, et al. 近视与远视的流行病学及其临床意义. Survey of Ophthalmology, 2012, 57(2):174-188
Morgan C, Sculley K, Saw A, et al. The epidemiology of myopia and hyperopia and clinical implications. Survey of Ophthalmology, 2012, 57(2):174-188
#近视 #用眼 #户外
为什么突然站起来会眼前发黑？
Why do we sometimes see black when standing up fast?
体位改变时血液因重力暂聚下肢，血压调节稍慢会使脑部短暂供血不足，出现发黑或头晕，通常很快恢复；若频繁发生可咨询医生。
On standing, blood briefly pools in the legs and a slow blood-pressure adjustment briefly starves the brain - causing dimming or dizziness that usually passes. Frequent episodes deserve a check-up.
难度 进阶 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 3 条独立证据
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Guyton 与 Hall《医学生理学》（Textbook of Medical Physiology）循环调控/体位性低血压章节
Guyton and Hall, Textbook of Medical Physiology (circulatory control / orthostatic hypotension chapter)
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-0-323-59712-8 · 核验依据 2 ISBN 978-1-4557-4377-3 (3rd ed., Elsevier) · 核验依据 3 ISBN 978-1-319-45541-5 (8th ed., Macmillan Learning)
#体位 #血压 #头晕
为什么耳朵里会有耳屎？
Why do we have earwax?
耳屎是耳朵自己分泌的“保护蜡”，能粘住灰尘和小虫，保护耳朵里面干干净净。
Earwax is a protective wax your ear makes to trap dust and tiny bugs and keep the inside clean.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 来源待核验 · Source pending review
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出处备注：著录仅给书名，无版次与年份；同一书名常对应多个版次，不臆测具体版本。
美国耳鼻咽喉头颈外科学会（AAO-HNS）《耳垢（耵聍）》
American Academy of Otolaryngology–Head and Neck Surgery (AAO-HNS): Earwax (cerumen)
#耳屎 #耳朵 #保护
眼睛是怎样把光变成“画面”的？
How do eyes turn light into a 'picture'?
光线经角膜和晶状体聚焦到视网膜，感光细胞把光转为神经信号，经视神经传送到大脑解读成影像。
Light is focused by the cornea and lens onto the retina; light-sensitive cells turn it into nerve signals sent via the optic nerve for the brain to decode.
难度 入门 · 适合 大众
CC BY 4.0 · 已核验 · Verified 2026-11-03
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Kandel 等《神经科学原理》（Principles of Neural Science）视觉处理章节
Kandel et al., Principles of Neural Science (visual processing chapter)
独立核验依据 · Independent verification: 核验依据 1 ISBN 9787111430810（豆瓣书目条目: 神经科学原理）
#眼睛 #视觉 #视网膜