Video: Dab tsi yog surfactant ua los ntawm?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Mob ntsws surfactant yog qhov sib xyaw ua ke ntawm phospholipids (PL) thiab cov protein (SP) uas txo qis qhov nro ntawm huab cua-kua interface ntawm alveolus. Nws yog ua txog li 70% txog 80% PL, feem ntau yog dipalmitoylphosphatidylcholine (DPPC), 10% SP-A, B, C thiab D, thiab 10% lipid nruab nrab, feem ntau yog cov roj (cholesterol).
Ntxiv mus, dab tsi yog surfactant thiab nws tsim nyob qhov twg?
Ntsiab Lus Pulmonary surfactant yog qhov sib xyaw ua ke ntawm cov lipid tshwj xeeb, cov protein thiab carbohydrates, uas yog tsim tawm hauv lub ntsws los ntawm hom II alveolar epithelial cells. Qhov sib xyaw ua ke yog qhov ua haujlwm sab hauv thiab ua kom txo qis qhov nro ntawm huab cua -kua interface ntawm alveoli.
Dab tsi yog surfactant siv rau? 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 ntub dej, cov emulsifiers, cov tshuaj ua npuas dej, thiab cov dispersants.
Ib qho ntxiv, surfactant yog dab tsi thiab vim li cas nws thiaj tseem ceeb?
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.
Yuav ua li cas koj ua surfactant?
- Sib tov 2 diav zaub roj thiab 2 diav kua zaub kua zaub ua kua rau hauv 1 nkas loos dej.
- Sib tov 2 1/2 diav ntawm cov kua xab npum me me rau hauv 1 nkas loos dej thiab hliv rau hauv lub raj mis tsuag.
- Sib tov 1 khob ntawm cov noob paj noob hlis thiab 2 diav ntawm cov kua xab npum me me rau hauv 1 khob dej.
Pom zoo:
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