2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nyob rau hauv cov leeg nqaij contraction, lub myosin taub hau rub cov actin filaments mus rau ib leeg ua rau ib tug luv luv sarcomere sarcomere A sarcomere yog ib chav tsev contractile ntawm cov nqaij fibers, thiab muaj ob ib nrab. - filaments ntawm actin thiab tag nrho filament ntawm myosin. Qhov kawg ntawm sarcomere yog Z-discs thiab qhov chaw yog qhov chaw nruab nrab yog M-kab (qhov nruab nrab ntawm myosin filament). https://www.varsitytutors.com › sarcomeres
Sarcomeres - MCAT Biology - Varsity Tutors
. Thaum I band thiab H zone yuav ploj lossis luv, qhov ntev A band yuav tsis hloov pauv.
Dab tsi ploj thaum cov leeg mob cog lus?
Thaum cov leeg cog lus teeb kuv bands plojthiab qhov tsaus ntuj A band txav los ze zog ua ke. Qhov no yog vim qhov swb ntawm myofilaments tawm tsam ib leeg. Z-kab rub ua ke thiab sarcomere luv li saum toj no.
Cov leeg nqaij hlav nyob qhov twg?
Cov leeg nqaij pib thaum lub paj hlwb tsim cov teeb liab. Lub teeb liab, ib qho impulse hu ua lub peev xwm ua tau, mus los ntawm ib hom paj hlwb hu ua lub cev muaj zog neuron. Lub neuromuscular hlws ris yog lub npe ntawm qhov chaw uas lub cev muaj zog neuron mus txog ib leeg leeg.
Yuav ua li cas thaum lub cev nqaij daim tawv?
Cov leeg nqaij hlav tshwm sim thaum sarcomeres luv, raws li tuab thiab nyias filaments swbyav dhau los ib leeg, uas yog hu ua zawv zawg filament qauv ntawm cov leeg nqaij. ATP muab lub zog rau kev tsim hla choj thiab filament zawv zawg.
Yuav ua li cas yog cov kauj ruam tseem ceeb hauv cov leeg nqaij?
Cov txheej txheem ntawm cov leeg nqaij contraction tshwm sim dhau ntau cov kauj ruam tseem ceeb, suav nrog:
- Depolarisation thiab calcium ion tso tawm.
- Actin thiab myosin cross-bridge tsim.
- Sliding mechanism ntawm actin thiab myosin filaments.
- Sarcomere shortening (muscle contraction)
Pom zoo:
Puas yog tawv nqaij tawv nqaij tawv nqaij khawb yooj yim?
tawv tawv, zoo li calfskin, tuaj yeem nkag siab rau khawbtab sis tau yooj yim rov qab los ntawm tus kws tshwj xeeb lub hnab. Puas yog tawv nqaij tawv tawv tawv tawv? Feem ntau hais lus, calf tawv yog ruaj khov, tshwj xeeb tshaj yog rau nws qhov hnyav thiab tuab.
Lub cev nqaij daim tawv twg yog cov khoom qab zib?
Sweetbread yog txiav nqaij los ntawm ob qho lub caj pas thymus, nyob hauv caj pas, lossis lub caj pas pancreas ntawm lub plab, hauv yaj, nqaij nyug, npua, lossis nyuj. Lawv muaj cov nplua nuj, creamy kev ntxhib los mos thiab feem ntau muab ci los yog kib.
Lub serum twg yog qhov zoo tshaj rau cov tawv nqaij tawv?
23 Qhov Zoo Tshaj Plaws Lub ntsej muag rau Smoother, Glower Skin 1/23. Qhov zoo tshaj plaws: SkinCeuticals C E Ferulic Serum. … 2/23. Cov Tshuaj Zoo Tshaj Plaws: L'Oréal Paris Revitalift Derm Intensives Vitamin C Face Serum. … 3/23. Best Brightening Serum:
Mob qog noj ntshav ntawm daim tawv nqaij kis mus rau qhov twg?
Ib txwm, thawj qhov chaw melanoma qog metastasizes yog cov qog ntshav, los ntawm kev tso cov cell melanoma mus rau hauv cov kua dej lymphatic, uas nqa cov hlwb melanoma los ntawm cov qog ntshav mus rau lub phiab ze tshaj plaws. Yuav ua li cas koj thiaj paub tias mob qog noj ntshav tau kis?
Yuav ua li cas tawv tawv tawv tawv?
tawv tawv tsis yooj yim tawg lossis tev. Qhov tseeb, nws zoo nkauj hnub nyoog dhau sijhawm, tsis zoo li tawv tawv. Nws yog ib qho tseem ceeb rau kev qhia peb tus kheej nrog cov khoom siv thiab cov khoom zoo peb cov tawv nqaij yog ua los ntawm cov khoom zoo tshaj plaws ntawm nws.
