Cov txheej txheem:
Video: Dab tsi yog cell membrane receptors ua los ntawm?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov no tus neeg txais kev pab systems muaj peb yam tseem ceeb: lub ligand, lub transmembrane tus neeg txais kev pab , thiab G protein. G-protein ua ke cov receptors feem ntau pom nyob rau hauv plasma daim nyias nyias . Cov tus neeg txais kev pab khi ib lub ligand los ntawm sab nraum lub cell.
Tib neeg kuj nug, dab tsi yog cell receptors ua los ntawm?
Cell - nto cov receptors tseem hu ua transmembrane cov receptors , yog cell nto, membrane-anchored, los yog ib qho proteins uas khi rau sab nraud ligand molecules. Hom no tus neeg txais kev pab spans lub plasma membrane thiab ua teeb liab transduction, converting ib tug extracellular teeb liab mus rau hauv ib tug intracellular teeb liab.
Kuj Paub, peb hom membrane receptors yog dab tsi? Muaj ntau hom ntawm cell-nto cov receptors , tab sis ntawm no peb mam li saib peb feem ntau hom : ligand-gated ion channels, G protein-coupled cov receptors , thiab tus neeg txais kev pab tyrosine kinases.
Tsis tas li ntawd, cov cell membrane ua li cas ua tus receptor?
Cell nto cov receptors ( membrane receptors , ua transmembrane cov receptors ) yog cov receptors uas yog embedded nyob rau hauv lub plasma daim nyias nyias ntawm hlwb . Lawv ua hauv cell signaling los ntawm kev tau txais (khi rau) extracellular molecules.
Dab tsi yog 4 hom receptors?
Feem ntau, sensory receptors teb rau ib qho ntawm plaub lub ntsiab stimuli:
- Tshuaj (chemoreceptors)
- Kub (thermoreceptors)
- Siab (mechanoreceptors)
- Lub teeb (photoreceptors)
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