![Cov pas nrig nyob qhov muag nyob qhov twg? Cov pas nrig nyob qhov muag nyob qhov twg?](https://i.answers-medical.com/preview/medical-health/13887217-where-are-the-rods-in-the-eye-j.webp)
Video: Cov pas nrig nyob qhov muag nyob qhov twg?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Qws cov cell yog photoreceptor cells nyob rau hauv retina ntawm qhov muag uas tuaj yeem ua haujlwm hauv lub teeb qis dua li lwm hom kev pom qhov muag pom, lub khob hliav qab. Qws feem ntau pom muaj nyob hauv cov npoo sab nrauv ntawm retina thiab tau siv hauv qhov muag pom ib puag ncig.
Kuj paub, cov pas nrig thiab lub khob qhov muag nyob qhov twg?
Lawv nyob hauv lub retina (txheej nyob tom qab ntawm lub qhov muag ). Muaj ob hom, pas nrig thiab cones.
Ib sab saum toj no, pes tsawg tus pas nrig thiab lub khob hliav qab nyob hauv qhov muag? Tib neeg lub qhov muag muaj kwv yees li 6 lab lub khob thiab 120 lab rods.
Ntxiv mus, cov pas nrig ua haujlwm li cas hauv lub qhov muag?
Qws, ib ntawm ob hom kab mob photoreceptive cells hauv retina ntawm qhov muag nyob rau hauv vertebrate tsiaj. Qws hlwb ua haujlwm tshwj xeeb neurons uas hloov pauv qhov muag pom hauv daim ntawv ntawm photons (qhov pom ntawm lub teeb) rau hauv tshuaj lom neeg thiab hluav taws xob uas tuaj yeem ua tiav los ntawm lub hauv paus paj hlwb.
Vim li cas thiaj tsis muaj pas nrig hauv fovea?
Hauv fov ua , muaj yog Tsis muaj pas nrig tsuas yog cones. Lub khob hliav qab tseem tau ntim ze ua ke ntawm no hauv fov ua tshaj li ntawm tus so ntawm lub retina. Tsis tas li ntawd, cov hlab ntsha thiab cov hlab ntsha mus ncig fov ua yog li lub teeb muaj txoj hauv kev ncaj qha mus rau photoreceptors.
Pom zoo:
Thawj qhov muag pom qhov muag nyob qhov twg?
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Occipital lub cev
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