Video: Vim li cas thiaj li tseem ceeb tshaj rau lub ntsws?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Lub luag haujlwm tseem ceeb ntawm surfactant yog kom txo qis qhov nro ntawm huab cua/kua dej sib txuas hauv alveoli ntawm lub ntsws . Qhov no xav tau kom txo qis kev ua haujlwm ntawm kev ua pa thiab tiv thaiv alveolar kev sib tsoo thaum kawg-tas sijhawm.
Ib sab ntawm qhov no, dab tsi ua rau surfactant hauv lub ntsws?
Cov pulmonary surfactant yog ua los ntawm alveolar type-II (AT-II) cells ntawm lub ntsws . Nws yog qhov tseem ceeb rau kev sib pauv tau zoo ntawm cov roj cua thiab rau kev tswj hwm kev ua haujlwm ncaj ncees ntawm alveoli. Surfactant yog cov khoom lag luam zais cia, muaj lipid thiab cov protein.
Kuj Paub, yuav ua li cas tiv thaiv kev tiv thaiv kab mob ntsws? Alveolar ua xua inactivates surfactant , thiab surfactant depletion ua ua xua los ntawm kev txo cov ntsws hauv siab (Pis). Peb xaus qhov ntawd surfactant ua kom lub cev nruj thiab ua rau transcapillary hydrostatic quab yuam hauv cov qauv mob ntsws no, yog li txo qis ua xua tsim thiab txhim kho kev sib pauv roj.
Tsis tas li kom paub, dab tsi yog surfactant hauv kev ua pa?
Surfactant : Cov kua dej zais los ntawm cov hlwb ntawm alveoli (cov pa me me hauv lub ntsws) uas ua haujlwm los txo qhov nro ntawm cov kua hauv lub ntsws; surfactant pab txhawb rau cov khoom siv ywj pheej ntawm cov ntaub so ntswg, tiv thaiv alveoli los ntawm kev sib tsoo.
Dab tsi yog siv cov surfactant?
Surfactants yog cov sib txuas uas txo qhov nro saum npoo (lossis cuam tshuam kev sib cuam tshuam) nruab nrab ntawm ob lub kua, nruab nrab ntawm cov pa thiab kua, lossis ntawm cov kua thiab cov khoom. Surfactants tuaj yeem ua cov tshuaj ntxhua khaub ncaws, cov neeg ua kom ntub dej, emulsifiers, cov tshuaj ua npuas dej, thiab cov dispersants.
Pom zoo:
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