Dab tsi yog qhov ua haujlwm ntawm parietal hlwb?

2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44

Parietal hlwb tsim gastric acid (hydrochloric acid) teb rau histamine (ntawm H2 receptors), acetylcholine (M3 receptors) thiab gastrin (gastrin receptors). Parietal cells muaj lub network zais zais dav (hu ua canaliculi) los ntawm qhov HCl tau zais los ntawm kev thauj mus los rau hauv. plab.

Vim li ntawd, vim li cas cov hlwb parietal tseem ceeb?

[1][2] Parietal hlwb ua lub luag haujlwm tseem ceeb hauv kev noj zaub mov hauv plab, nrog rau kev nqus ntawm cov vitamin B12 (cobalamin) vim qhov tso tawm ntawm qhov tseem ceeb (IF). [3] Paracrine, endocrine, thiab neural pathways tau koom nrog hauv kev tswj nruj ntawm cov kua qaub los ntawm parietal hlwb.

Tsis tas li ntawd, puas hlwb parietal tsim bicarbonate? Parietal hlwb muaj lub network zais cia dav dav (hu ua canaliculi) los ntawm qhov uas cov tshuaj hydrochloric tau tso rau hauv lub lumen ntawm lub plab. Cov parietal hlwb tso tawm bicarbonate mus rau hauv cov hlab ntshav hauv tus txheej txheem, uas ua rau nce ib ntus ntawm pH hauv cov ntshav, hu ua dej hiav txwv alkaline.

Tom qab ntawd, dab tsi ua rau cov hlwb parietal?

Parietal hlwb yog txhawb nqa ncaj qha thiab tsis ncaj los ntawm neural (acetylcholine), endocrine (gastrin), thiab paracrine (histamine) mechanisms. Hauv cov txheej txheem neural, kev tshem tawm ntawm cov hlab ntshav postganglionic cov hlab ntsha tso tawm ACh uas tom qab ntawd khi rau muscarinic M₃ receptor rau parietal hlwb.

Puas yog cov hlwb parietal zais cov hnoos qeev?

Hom qog qog Cov qog qog feem ntau muaj hnoos qeev -tsim tawm hlwb npe foveolar hlwb . Parietal hlwb , uas zais hydrochloric acid (HCl) tau tawg hauv cov qog, nrog rau feem ntau ntawm lawv nyob hauv ib nrab. Sab qaum ntawm cov qog muaj xws li hnoos qeev caj dab hlwb ; nyob rau hauv no qhov kev faib hlwb yog pom.