Video: Yuav ua li cas rau H Zone thaum cov leeg nqaij sib cog lus?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Nco ntsoov tias thaum lub sijhawm nqaij contraction , qhov ntev ntawm cov filaments tsis hloov. Qhov loj ntawm A band tsis hloov pauv qhov loj me. Thaum kawg, tus H cheeb tsam yog qhov nruab nrab ntawm lub sarcomere tsuas yog tuab myosin filaments. Lub sijhawm nqaij contraction , cov H tsam luv.
Ib yam li ntawd, yuav ua li cas rau h zone thaum lub sij hawm contraction?
Cov H cheeb tsam - Central cheeb tsam ntawm A cheeb tsam -muaj tsuas yog tuab filaments (myosin) thiab luv luv thaum contraction . Cov H tsam ua me me thiab me dua vim nce kev sib tshooj ntawm actin thiab myosin filaments, thiab cov nqaij ua kom luv. I band muaj tsuas yog nyias nyias thiab kuj luv.
Ib tug kuj yuav nug, yuav ua li cas thaum koj cov leeg mob? Thaum a nqaij cog lus los yog luv luv, nws rub rau ntawm ob qho tib si nws keeb kwm thiab kev tso rau hauv cov pob txha thiab ua rau cov leeg txav mus. Txhawm rau rov qab qhov sib koom ua ke mus rau nws txoj haujlwm qub, qhov sib txuam cov leeg nyob rau sab nraud ntawm qhov sib koom yuav tsum daim ntawv cog lus thiab luv. Cov leeg tsis txhob thawb pob qij txha, lawv tsuas yog ua kom luv thiab rub.
Ib sab ntawm qhov no, Puas H Zone ploj thaum lub sijhawm sib cog?
Lub sijhawm nqaij kev cog lus , lub taub hau myosin rub cov actin filaments mus rau ib leeg uas ua rau lub sarcomere luv. Hos kuv band thiab H tsam yuav ploj los yog luv, qhov ntev A band yuav nyob twj ywm tsis hloov. Cov H cheeb tsam hais txog thaj tsam ntawm myosin uas tsis sib tshooj los ntawm kev ua.
Dab tsi yog H Zone hauv cov leeg?
H cheeb tsam . oxford. pom tshiab. H cheeb tsam Lub cheeb tsam ntawm ib tug striated nqaij fiber uas tsuas muaj tuab (myosin) filaments. Cov H cheeb tsam zoo nkaus li lub teeb band nyob nruab nrab ntawm qhov tsaus ntuj A band nyob rau hauv nruab nrab ntawm ib tug sarcomere.
Pom zoo:
Yuav muaj dab tsi tshwm sim thaum cov leeg ncig sib cog lus?
Hauv lub teeb ci, cov leeg ncig ua haujlwm sib cog lus thaum cov leeg radial so. Qhov no ua rau tus menyuam kawm ntawv nruj thiab tsis pom lub teeb nkag mus rau qhov muag. Hauv qhov xwm txheej tsis zoo, qhov rov tshwm sim. Cov leeg ncig tau so thiab cov leeg sib zog ua haujlwm sib cog lus, ua rau cov menyuam kawm ntawv nthuav dav thiab tso lub teeb ntau dhau mus rau hauv lub qhov muag
Cov leeg twg thaum sib cog lus yuav ua rau kom muaj huab cua ntau ntxiv hauv lub plab thoracic?
Kev sib cais ntawm ob lub diaphragm (diaphragm flattens) thiab sab nraud sab nraud (rub cov tav tawm thiab tawm) yuav ua rau lub ntim ntawm kab noj hniav thoracic. Qhov no yuav ua rau huab cua txav mus rau hauv lub ntsws (kev tshoov siab)
Yuav ua li cas mob plawv cov leeg nqaij daim ntawv cog lus?
Thaum lub plawv mob leeg nqaij sib cog lus, myosin filament rub cov actin filaments mus rau ib leeg, uas ua rau lub cell nqaim. Lub xovtooj ntawm tes siv ATP los txhawb qhov kev cog lus no. Qhov no tsim ib chav tsev ntawm cov leeg nqaij, hu ua sarcomere. Intercalated discs txuas lub plawv mob hlwb
Yuav ua li cas rau cov nqaij du thaum nws cog lus?
Smooth nqaij contraction yog tshwm sim los ntawm zawv zawg ntawm myosin thiab actin filaments (ib tug zawv zawg filament mechanism) ntawm ib leeg. Lub zog rau qhov no tshwm sim yog muab los ntawm hydrolysis ntawm ATP. Tsis zoo li cov hlab plawv thiab pob txha pob txha, cov leeg du tsis muaj calcium-binding protein troponin
Dab tsi tshwm sim tshwm sim ntawm kev sib tshuam neuromuscular uas ua rau cov leeg sib cog lus?
Thaum qhov muaj peev xwm ua tau mus txog qhov sib txuas neuromuscular, nws ua rau acetylcholine raug tso tawm rau hauv qhov kev sib txuas no. Cov acetylcholine khi rau cov nicotinic receptors concentrated nyob rau hauv lub motor kawg phaj, ib qho chaw tshwj xeeb ntawm cov nqaij fibers lub post-synaptic membrane