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.
Dab tsi ua rau tso cov calcium ions los ntawm sarcoplasmic reticulum?
Nervous stimulation ua rau depolarisation ntawm cov leeg nqaij daim nyias nyias (sarcolemma) uas ua rau cov calcium ions tso tawm ntawm sarcoplasmic reticulum.
Thaum calcium tso tawm los ntawm sarcoplasmic reticulum nws khi qhov twg?
Muscle Physiology: Piv txwv Nqe Lus Nug 2
Kev piav qhia: Calcium raug tso tawm los ntawm sarcoplasmic reticulum mus rau hauv lub sarcoplasm. Nws khi cov troponin molecules ntawm nyias filaments, ua rau cov strands ntawm tropomyosin hloov, nthuav tawm cov myosin-binding qhov chaw ntawm nyias filaments.
Thaum calcium tso tawm los ntawm sarcoplasmic reticulum Nws ces cuam tshuam nrog?
Lub sarcoplasmic reticulum yog cov organelle tshwj xeeb ntawm cov leeg nqaij uas tso cai rau calcium kom sequestered. Thaum calcium tau tso rau hauv cytoplasm nws cuam tshuam nrog troponin thiab tropomyosin, cia myosin thiab actin khi thiab ua rau contraction.
Thaum calcium tso tawm los ntawm sarcoplasmic reticulum dab tsi tshwm sim tam sim tom ntej?
(10) Lub sarcoplasmic reticulum tso tseg calcium ions, thiab tam sim ntawd pib rov thov tag nrho cov calcium ions uas tau tso tawm(11) Thaum tsis muaj calcium ions, Kev hloov pauv hauv kev teeb tsa ntawm troponin thiab tropomyosin tom qab ntawd thaiv qhov kev txiav txim ntawm myosin molecule hau, thiab kev cog lus tseg.
