2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
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.
Sarcoplasmic reticulum nyob qhov twg?
Lub sarcoplasmic reticulum (SR) yog ib daim ntawv ntawm cov nqaij mos endoplasmic reticulum (ER) pom nyob rau hauv pob txha pob txha uas ua haujlwm ua tus tswj hwm ntawm Ca 2 + cia thiab tso homeostasis thaum lub sij hawm thiab tom qab cov leeg nqaij contraction [51].
Vim li cas nws thiaj hu ua sarcoplasmic reticulum?
Lub sarcoplasmic reticulum (SR) yog cov txheej txheem membrane-bound nyob rau hauv cov leeg hlwb uas zoo ib yam li cov endoplasmic reticulum du nyob rau hauv lwm lub hlwb. … Yog li ntawd, nws yog tseem ceeb heev uas calcium ion qib tswj nruj, thiab tuaj yeem tso rau hauv lub cell thaum tsim nyog thiab tom qab ntawd tshem tawm ntawm tes.
Dab tsi yog qhov tshwj xeeb ntawm sarcoplasmic reticulum?
Lub sarcoplasmic reticulum (SR) tsim lub ntsiab ntawm cov calcium hauv lub cev hauv cov leeg nqaij striated thiab ua lub luag haujlwm tseem ceeb hauv kev tswj hwm ntawm excitation-contraction-coupling (ECC) thiab ntawm intracellular. calcium concentrations thaum contraction thiab so.
Pom dab tsi hauv sarcoplasm?
Sarcoplasm yog lub cytoplasm ntawm cov leeg nqaij. Nws yogCov kua dej uas muaj ATP thiab phosphagens, nrog rau cov enzymes thiab nruab nrab thiab cov khoom lag luam molecules koom nrog ntau yam kev cuam tshuam metabolic. Cov hlau ntau tshaj plaws hauv sarcoplasm yog potassium.
Pom zoo:
Puas sarcoplasmic reticulum khaws sodium?
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.
Leej twg nrhiav tau induced haum txoj kev xav?
Tus qauv tsim kom haum yog thawj zaug los ntawm Koshland hauv xyoo 1958 los piav qhia txog kev hloov pauv ntawm cov protein hauv cov txheej txheem khi. Cov qauv no qhia tau hais tias ib qho enzyme, thaum khi nrog nws cov substrate, optimizes lub interface los ntawm lub cev kev sib cuam tshuam los tsim ib tug complex qauv.
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).
Leej twg tau spayed thiab leej twg tau txais neutered?
Kev npam tus dev hais txog kev tshem tus poj niam dev lub cev xeeb tub, hos neutering yog hais txog cov txheej txheem uas ua rau txiv neej. Thaum tus poj niam tus dev tau spayed, tus kws kho tsiaj tshem nws zes qe menyuam thiab feem ntau nws lub tsev menyuam thiab.
Puas nrhiav tau lossis nrhiav tau?
Yog li, koj yuav tsum tau siv "could find". Lub modal verb, tau yog twb nyob rau hauv nws paste-form: ua. Yog li koj tsis tas yuav hloov pauv los nrhiav. Yuav nrhiav tau lossis nrhiav tau? "Ntaus" yog sib npaug. "
