2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Nws tau kwv yees tias thaum cov leeg nqaij so, calcium concentration hauv sarcoplasmic reticulum yog ntau tshaj 100 mmol / kg ntawm qhov hnyav qhuav. … Qhov concentration ntawm sodium ions nyob rau hauv cov leeg fiber ntau yog khaws cia tsawg heev los ntawm lub twj tso kua mis uas muajib sodium/potassium–activated ATPase.
sarcoplasmic reticulum khaws dab tsi?
Sarcoplasmic reticulum, intracellular system ntawm kaw saclike membranes koom nrog hauv kev khaws cia intracellular calcium nyob rau hauv striated (skeletal) cov leeg hlwb.
Dab tsi yog tso tawm los ntawm sarcoplasmic reticulum?
Thaum cov nqaij ntshiv, calcium ions raug tso tawm ntawm nws lub khw hauv sarcoplasmic reticulum, mus rau hauv sarcoplasm (cov leeg). … Calcium yog pumped rov qab mus rau hauv SR kom txo cov calcium ion concentration nyob rau hauv lub sarcoplasm, so cov leeg (tua tawm contraction).
Dab tsi yog sodium thaum lub sij hawm cov leeg nqaij contraction?
Sodium txhawb kev dephosphorylation ntawm ATP thiab ADP nyob rau hauv muaj magnesium. Qhov no yuav ua rau cov leeg nqaij. Lwm tus tau hais tias kev nkag mus ntawm calcium thaum lub sij hawm membrane depolarization pib contraction ntawm cov nqaij fibers.
Puas sodium cuam tshuam rau cov leeg nqaij?
The sodium influx kuj xa lus hauv cov leeg nqaij kom ua rau tso tawm cov calcium ions uas khaws cia. Cov calcium ions diffuse mus rau hauv cov leeg nqaij. Covkev sib raug zoo ntawm cov chains ntawm cov protein nyob rau hauv cov leeg nqaij hloov, ua rau contraction.
Pom zoo:
Leej twg nrhiav tau sarcoplasmic reticulum?
Nyob rau xyoo 1902, Emilio Veratti ua cov lus piav qhia tseeb tshaj plaws, los ntawm lub teeb microscopy, ntawm cov qauv reticular hauv sarcoplasm. Txawm li cas los xij, cov qauv no yuav luag ploj mus rau tus txiv neej txoj kev paub ntau dua 50 xyoo thiab tau rov tshawb pom dua thaum xyoo 1960, tom qab kev taw qhia ntawm electron microscopy.
Thaum twg sarcoplasmic reticulum tso calcium?
Lub sarcoplasmic reticulum khaws cov calcium ions, uas nws tso tawm thaum cov leeg hlwb raug txhawb; cov calcium ions ces pab kom hla cov leeg nqaij contraction. sarcoplasmic reticulum tso calcium li cas? Thaum cov nqaij ntshiv, calcium ions raug tso tawm ntawm nws lub khw hauv sarcoplasmic reticulum, mus rau hauv sarcoplasm (cov leeg).
Yuav khaws lossis khaws cia?
Lo lus keep txhais tau tias "kom muaj lossis khaws cia," ntawm ib qho khoom, lossis "tso khoom" rau qhov chaw. Lub sijhawm dhau los thiab yav dhau los kev koom tes ntawm lo lus khaws yog "keep". Yuav khaws kab lus?
Akeeba khaws cov ntaub ntawv khaws cia nyob qhov twg?
Qhov chaw nyob ntawm lub nplaub tshev uas Akeeba Backup tso tawm koj cov ntaub ntawv thaub qab ib txwm administrator/components/com_akeeba/backup. Akeeba thaub qab nyob qhov twg? Cov ntaub ntawv thaub qab yog qhov uas koj hais rau Akeeba Backup kom muab tso rau lawv, piv txwv li hauv Cov Ntawv Qhia Tawm koj tau teev tseg hauv nplooj ntawv teeb tsa.
Puas khaws cia lossis khaws cia?
Lo lus khaws yog txhais tias "kom muaj lossis khaws cia," ntawm ib qho khoom, lossis "tso khoom" rau qhov chaw. Lub caij nyoog dhau los thiab yav dhau los ntawm lo lus khaws is "keep". Thaum siv tau yog? Raws li kuv hais saum toj no, yog thiab yav dhau los, tab sis lawv siv txawv.
