Qhov sib txawv tseem ceeb ntawm hom 1 thiab hom 2 nqaij fibers yog tias hom 1 nqaij fibers cog lus qeeb thaum hom 2 nqaij fibers cog lus sai. Ntxiv mus, hom 1 nqaij fibers nyob ntawm seb aerobic respiration thaum hom 2 nqaij fibers nyob ntawm seb anaerobic respiration.
Muaj peb hom nqaij loj. Ntawm lawv, skeletal leeg yog ib hom, uas yog txuas nrog lub cev pob txha. Cov leeg nqaij ib leeg ua rau cov leeg pob txha. Muaj ob lub ntsiab ntawm cov nqaij fibers uas yog hom 1 thiab hom 2 nqaij fibers. Lawv kuj hu ua qeeb-twitch thiab ceev-twitch leeg nqaij fibers feem.
Dab tsi yog Hom 1 Muscle Fibers?
Hom 1 nqaij fibers yog ib hom nqaij fibers hauv cov leeg pob txha. Tsis tas li ntawd, lawv tseem hu ua qeeb-twitch fibers vim lawv qeeb qeeb. Lawv nplua nuj nyob rau hauv mitochondria thiab kuj muaj ntau myoglobin. Yog li, cov fibers no muaj txiaj ntsig zoo hauv kev siv oxygen los tsim ATP tsis tu ncua ntev.
Daim duab 01: Cov leeg pob txha
Li no, lawv yog cov leeg uas pab peb hauv kev khiav deb lossis marathons, vim lawv tuaj yeem tiv taus kev qaug zog ntev. Hom 1 nqaij fibers muaj xim liab vim muaj cov ntsiab lus siab ntawm myoglobin, oxygen, thiab mitochondria.
Dab tsi yog Hom 2 Muscle Fibers?
Hom 2 nqaij fibers yog hom thib ob loj ntawm cov leeg nqaij hauv cov leeg pob txha. Lawv tseem hu ua fast-twitch fibers. Muaj ob hom xws li hom 2a thiab hom 2b. Tsis tas li ntawd, cov fibers no siv anaerobic ua pa los tsim roj. Hom 2a fibers yog lub npe hu ua intermediate fast-twitch fibers los yog oxidative fibers ceev thiab lawv yog ib tug ua ke ntawm hom 1 thiab hom 2 nqaij fibers. Ntawm qhov tod tes, hom 2a fibers siv ob qho tib si aerobic thiab anaerobic metabolism. Hom 2b fibers tsuas yog siv cov metabolism hauv anaerobic thiab lawv hu ua glycolytic fibers ceev. Ob hom no yog tua ceev heev.
Dab tsi yog qhov zoo sib xws ntawm Hom 1 thiab Hom 2 Cov leeg nqaij fibers?
- Ob hom 1 thiab Hom 2 cov leeg nqaij yog cov leeg nqaij ntawm cov leeg pob txha.
- Hom 1 thiab Hom 2 Cov leeg nqaij muaj myoglobin.
- Ob hom 1 thiab Hom 2 Cov leeg nqaij tuaj yeem cog lus.
- Cov fibers no tsim ATP.
- Hom 1 thiab Hom 2 Cov leeg nqaij fibers muaj ntau cov hlab ntsha thiab mitochondria.
Qhov txawv ntawm Hom 1 thiab Hom 2 Cov leeg nqaij fibers yog dab tsi?
Hom 1 thiab hom 2 leeg nqaij fibers yog ob lub ntsiab ntawm cov leeg nqaij ntawm cov leeg pob txha. Hom 1 fibers yog kev cog lus qeeb thiab tsim ATP siv aerobic metabolism. Lawv muaj ntau mitochondria thiab cov ntsiab lus siab ntawm myoglobin. Lawv muaj xim liab. Cov nqaij fibers no pab tau rau kev khiav deb. Lawv muaj peev xwm ua rau qaug zog. Ntawm qhov tod tes, hom 2 nqaij fibers yog hom thib ob ntawm cov leeg nqaij fibers uas ua haujlwm nrawm. Qhov no yog qhov sib txawv tseem ceeb ntawm hom 1 thiab hom 2 cov leeg nqaij. Ntxiv mus, muaj ob hom hom 2 leeg nqaij fibers; hom 2a thiab hom 2b. Lawv muaj qib qis ntawm mitochondria thiab lawv siv ua pa anaerobic. Lawv tsis kam ua rau qaug zog yog tsawg piv rau hom 1 cov leeg nqaij fibers.
Summary – Type 1 vs Type 2 Muscle Fibers
Muaj ob hom nqaij fibers uas yog hom 1 thiab hom 2. Ob hom muaj myoglobin, capillaries, thiab mitochondria. Hom 1 cov leeg nqaij fiber ntau tiv taus qhov qaug zog thiab tsim lub zog tsis tu ncua rau lub sijhawm ntev siv aerobic metabolism. Lawv ua haujlwm qeeb vim li no pab tau rau kev khiav deb thiab lwm yam. Hom 2 nqaij fibers yog ob hom; hom 2a thiab hom 2b. Lawv ua haujlwm sai thiab siv cov metabolism hauv anaerobic. Qhov no yog qhov txawv ntawm hom 1 thiab hom 2 leeg nqaij fibers.
