Extensor digitorum khiav los ntawm lateral epicondyle ntawm humerus mus rau medial plaub phalanges ntawm tes. Ua li no, nws tsim rub rau qhov txuas ntxiv ntawm plaub ntiv tes nruab nrab hauv lawv cov metacarpophalangeal thiab ob leeg interphalangeal pob qij txha. Extensor digitorum kuj koom nrog qhov txuas ntxiv ntawm lub dab teg.
Thaum flexor digitorum profundus cog lus dab tsi tshwm sim?
Piv txwv li, flexor digitorum profundus tsim flexion ntawm lub dab teg nrog rau flexion ntawm txhua tus ntiv tes sib koom nws hla. Cov hamstrings, ntawm qhov tod tes, tsim kev txuas ntxiv ntawm ib qho kev sib koom tes (lub duav) thiab flexion ntawm lwm tus (lub hauv caug).
Yuav tsum muaj dab tsi tshwm sim rau cov leeg nqaij kom nres quizlet?
Calcium yuav tsum tau nquag tso rov qab mus rau hauv qhov chaw nres nkoj ntawm lub sarcoplasmic reticulum txhawm rau txiav qhov contraction thiab so cov leeg pob txha. Rau txhua Ca2+ thauj, ib qho ATP molecule yog hydrolyzed.
Yuav tsum muaj dab tsi tshwm sim rau cov leeg nqaij kom nres?
Cov leeg nqaij feem ntau nres thaum taw qhia los ntawm lub cev muaj zog neuron xaus , uas rov ua dua cov sarcolemma thiab T-tubules, thiab kaw cov kab hluav taws xob-gated calcium hauv SR. Ca++ ions yog tom qab ntawd rov qab mus rau hauv SR, uas ua rau tropomyosin reshield (los yog rov npog) cov chaw khi ntawm cov actin strands.
Yuav ua li cas txhawm rau txhawm rau txav ntawm tus choj hla kev?
Yuav ua li cas los pabkev txav ntawm kev hla choj? Nyob rau hauv lub xub ntiag ntawm calcium ions, feem ntawm myosin filament hu ua cross-bridges khoov rov qab thiab txuas mus rau ib qho actin filament. Tom qab txuas rau actin filament, tus ntoo khaub lig-bridges khoov rau pem hauv ntej, thiab cov actin filament yog rub nrog.
