Video: Hom kev txais neeg twg yog siv los tshuaj xyuas cov ntxhiab tsw?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Olfactory receptors (ORs), tseem hu ua tshuaj tsw qab receptors , yog qhia nyob rau hauv lub cell daim nyias nyias ntawm olfactory receptor neurons thiab yog lub luag hauj lwm rau kev tshawb nrhiav ntawm odorants (piv txwv li, tebchaw uas muaj ib tug tsw) uas ua rau kom lub siab hnov tsw.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog cov receptors rau tsw?
Qhov Sense of Smell. Cov ntxhiab nyob ntawm cov neeg hnov qab hnov qab uas teb rau cov tshuaj lom neeg hauv huab cua. Hauv tib neeg, cov no cov tshuaj chemoreceptors yog nyob hauv cov olfactory epithelium - ib thaj ntawm cov ntaub so ntswg txog qhov luaj li cas ntawm cov ntawv xa ntawv nyob siab hauv lub qhov ntswg.
Ntxiv mus, yuav hnov tsw li cas? Tib neeg ntes hnov tsw los ntawm kev nqus cua uas muaj tsw molecules, uas ces khi rau receptors nyob rau hauv lub qhov ntswg, relaying lus rau lub hlwb. Feem ntau cov ntxhiab tsw yog tsim los ntawm ntau cov ntxhiab tsw; piv txwv li, whiff ntawm chocolate, ua los ntawm ntau pua qhov sib txawv tsw molecules.
Hais txog qhov no, cov ntxhiab tsw receptors ua haujlwm li cas?
Koj muaj peev xwm tsw tsw los ntawm cov hlwb tshwj xeeb, hu ua olfactory sensory neurons, uas pom nyob hauv thaj me me ntawm cov ntaub so ntswg siab sab hauv lub qhov ntswg. Cov hlwb no txuas ncaj qha mus rau lub hlwb. Thaum cov neurons pom cov molecules, lawv xa cov lus rau koj lub hlwb, uas txheeb xyuas qhov tsw tsw.
Muaj pes tsawg tus neeg txais cov ntxhiab tsw ntxhiab ntawm tib neeg?
Cov tib neeg lub qhov ntswg muaj kwv yees li 400 yam ntawm tshuaj tsw qab receptors uas tau ntes tsawg kawg yog 1 trillion txawv tsw. Cov tib neeg qhov ntswg tau Paub qhov txawv tsawg kawg yog 1 trillion txawv tsw, kev daws teeb meem ntawm qhov loj tshaj qhov kwv yees dhau los ntawm tsuas yog 10,000 scents, cov kws tshawb fawb qhia hnub no hauv Science1.
Pom zoo:
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