Qhov sib txawv tseem ceeb ntawm peptic thiab oxyntic hlwb yog cov hlwb peptic secrete pepsinogen thiab gastric lipase thaum oxyntic cells secrete hydrochloric acid thiab intrinsic factor.
Cov qog nqaij hlav feem ntau yog cov qog exocrine uas tso tawm ntau yam enzymes, hnoos qeev, hydrochloric acid thiab cov tshuaj hormones. Lawv muaj nyob rau hauv lub plab pits nyob rau hauv lub plab mucosa. Cov hlwb tseem ceeb lossis cov hlwb peptic thiab cov hlwb parietal lossis cov hlwb oxyntic yog ob hom hlwb pom hauv cov qog nqaij hlav. Peptic cells tso cov zymogen (proenzyme) hu ua pepsinogen, uas yog ib qho ua ntej rau pepsin. Oxyntic cells secrete HCl thiab intrinsic factor.
Peptic Cells yog dab tsi?
Peptic cells yog hom kab mob plab. Lawv kuj tseem hu ua cov hlwb tseem ceeb. Cov hlwb no muaj nyob rau hauv thaj tsam basal ntawm lub plab hnyuv. Yog li ntawd, lawv tau pom tob hauv cov txheej mucosal ntawm lub plab hauv ob sab phlu. Peptic cells muaj ntau lub zais zis loj uas muaj cov enzymes digestive. Lawv feem ntau tso tawm proenzyme hu ua pepsinogen. Nws yog ib qho precursor rau pepsin. Pepsin yog lub enzyme uas catalyzes digestion ntawm cov protein. Pepsin yog tsim nyob rau hauv lub xub ntiag ntawm HCl. Yog li ntawd, peptic hlwb ua haujlwm ua ke nrog parietal hlwb. Ntxiv nrog rau pepsinogen, cov hlwb tseem tsim cov lipase enzymes thiab. Ntxiv mus, peptic hlwb secrete chymosin hauv ruminants.
Daim duab 01: Peptic Cells thiab Oxyntic Cells
Oxyntic Cells yog dab tsi?
Oxyntic cells yog lwm hom kab mob plab. Lawv tseem hu ua parietal hlwb. Lawv muaj nyob rau hauv cov phab ntsa ntawm cov hlab ntsha ntawm lub plab. Oxyntic hlwb tso tawm hydrochloric acid nyob rau hauv teb rau peb stimulators: acetylcholine, gastrin thiab histamine. Yog li, oxyntic cells yog qhov chaw ntawm HCl hauv plab. Lawv ua lub luag haujlwm tseem ceeb hauv gastric homeostasis. Gastric HCL yog qhov paub zoo tshaj plaws ntawm cov kua txiv hmab txiv ntoo. HCl hloov pepsinogen rau pepsin. Tsis tas li ntawd, oxyntic cell secrete qhov tseem ceeb ntawm cov khoom. Lub hauv paus tseem ceeb yog glycoprotein uas tsim nyog rau kev nqus ntawm vitamin B12 hauv kev noj haus. Intrinsic yam yog tsim los teb rau gastrin, histamine, insulin, thiab vagal stimulation.
Daim duab 02: Oxyntic Cells
Structurally, oxyntic hlwb yog pyramidal nyob rau hauv cov duab. Lawv lub cell cytoplasm yog ntim nrog mitochondria, nrog ntau lysosomes thiab ib tug tshwj xeeb organelle hu ua tubulovesicles. Ntxiv mus, oxyntic hlwb qhia ob yam kev hloov pauv txawv raws li lub xeev zais cia thiab lub xeev so. Feem ntau, tib neeg lub plab muaj ib txhiab oxyntic hlwb. Lawv yog cov hlwb epithelial zoo ib yam li cov hlwb peptic.
Dab tsi zoo sib xws ntawm Peptic thiab Oxyntic Cells?
- Peptic thiab oxyntic hlwb yog ob hom hlwb pom nyob rau hauv lub plab.
- Lawv yog cov hlwb epithelial.
- Peptic hlwb ua haujlwm ua ke nrog cov parietal hlwb vim pepsinogen hloov mus rau pepsin nquag los ntawm HCL.
Qhov txawv ntawm Peptic thiab Oxyntic Cells yog dab tsi?
Peptic cells yog cov qog nqaij hlav hauv plab uas zais cov pa pepsinogen thiab gastric lipases, thaum cov hlwb oxyntic yog cov qog nqaij hlav hauv plab uas tso tawm HCL thiab qhov tseem ceeb hauv lub cev. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm peptic thiab oxyntic hlwb.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm peptic thiab oxyntic hlwb hauv daim ntawv tabular.
Summary – Peptic vs Oxyntic Cells
Peptic hlwb tsim cov pepsinogen thiab gastric lipases, thaum oxyntic cells tso HCl thiab qhov tseem ceeb. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm peptic thiab oxyntic hlwb. Ob hom cell ua haujlwm ua ke. HCL yog xav tau los hloov pepsinogen rau pepsin nquag. Ob leeg peptic thiab oxyntic hlwb yog cov qog nqaij hlav hauv plab. Lawv yog cov khoom tseem ceeb ntawm cov txheej txheem digestion.
