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.
