Isotonic vs Isometric
Cov leeg nqaij tseem ceeb heev vim nws tuaj yeem tsim kev txav thiab muab kev tiv thaiv thiab kev txhawb nqa rau cov kabmob hauv lub cev. Qhov tshwj xeeb, cov yam ntxwv ntawm cov leeg nqaij yog cov txheeb ze thiab cov koom haum ntawm actin thiab myosin filaments hauv cov hlwb. Cov filaments no tshwj xeeb rau kev cog lus. Muaj peb hom leeg nqaij tam sim no nyob rau hauv vertebrates; uas yog, cov leeg du, cov leeg pob txha, thiab cov leeg plawv. Kev cog lus ntawm cov hlab plawv thiab cov leeg du yog, feem ntau, tsis tuaj yeem ua haujlwm thaum cov leeg pob txha nyob hauv kev yeem tswj hwm. Nyob ntawm tus qauv ntawm kev nro ntau lawm, cov leeg nqaij tuaj yeem raug cais raws li isotonic contraction thiab isometric contraction. Kev ua ub no txhua hnub suav nrog ob qho tib si isotonic thiab isometric contraction ua ke ntawm cov leeg.
Isotonic Contraction yog dab tsi?
Lo lus 'isotonic' txhais tau hais tias sib npaug sib npaug los yog qhov hnyav. Nyob rau hauv no contraction, qhov nro tsim yog tas li thaum lub sij hawm ntev ntawm cov leeg hloov. Nws cuam tshuam rau cov leeg nqaij luv thiab ua kom muaj zog thiab so ntawm cov leeg thiab tshwm sim nrog kev txav xws li taug kev, khiav, hla thiab lwm yam.
Isotonic contraction tuaj yeem muab faib ua ob pawg ua concentric thiab eccentric. Nyob rau hauv concentric contraction, cov leeg shortens whereas, nyob rau hauv eccentric contraction, cov leeg lengthens thaum lub contraction. Eccentric nqaij contraction yog ib qho tseem ceeb raws li nws tuaj yeem tiv thaiv kev hloov pauv sai ntawm qhov ntev uas yuav ua rau cov leeg nqaij puas tsuaj thiab nqus cov shocks.
Isometric Contraction yog dab tsi?
Lo lus 'isometric' txhais tau hais tias qhov ntev lossis tsis hloov pauv cov leeg. Hauv isometric contractions, cov leeg nqaij ntev tseem nyob tas li thaum lub zog sib txawv. Ntawm no, qhov nro loj hlob hauv cov leeg, tab sis cov leeg tsis luv kom txav ib qho khoom. Yog li ntawd, nyob rau hauv isometric concentration, thaum tsis muaj qhov khoom txav mus, cov hauj lwm sab nraud ua tiav yog xoom. Hauv qhov kev cog lus no, ib tus neeg fibers tau luv txawm tias tag nrho cov leeg tsis hloov nws qhov ntev, yog li kev tawm dag zog isometric pab ntxiv dag zog rau cov leeg.
Isometric contraction tsis koom nrog kev sib koom ua ke kom cov neeg mob xav tau kev kho kom rov zoo tuaj yeem ua cov isometric ce kom tsis txhob mob txav. Cov kev tawm dag zog no tsis pom zoo rau cov neeg mob ntshav siab vim nws tuaj yeem ua rau muaj kev phom sij txaus ntshai ntawm cov ntshav siab. Piv txwv ntawm kev txav isometric suav nrog tuav ib qho khoom zoo li tus puav lossis racket. Ntawm no, cov leeg nqaij daim ntawv cog lus tuav thiab ruaj khov ntawm cov khoom tseem tsis tau hloov qhov ntev ntawm cov leeg thaum tuav lawv.
Qhov txawv ntawm Isotonic thiab Isometric Contraction yog dab tsi?
• Hauv isotonic contraction, qhov nro yog tas li thaum qhov ntev ntawm cov leeg sib txawv. Hauv isometric contraction, cov leeg ntev tseem nyob tas li thaum qhov nro sib txawv.
• Isotonic twitch muaj lub sijhawm luv latent, lub sijhawm luv dua, thiab lub sijhawm so ntev dua. Hauv qhov sib piv, isotonic twitch muaj lub sijhawm latent ntev dua, lub sijhawm sib cog lus ntev dua, thiab lub sijhawm so luv dua.
• Kub nce txo isometric nro whereas nws nce isotonic twitch shortening.
• Lub tso cua sov ntawm isometric contraction tsawg dua thiab, yog li ntawd, isometric contraction yog ntau zog npaum, whereas ntawm isotonic contraction yog ntau thiab, yog li ntawd, yog tsawg zog npaum.
• Thaum lub sij hawm isometric contraction, tsis muaj shortening tshwm sim thiab, yog li ntawd, tsis muaj kev ua hauj lwm sab nraud yog ua tiav, tab sis thaum lub sij hawm isotonic contraction, shortening tshwm sim thiab lwm yam hauj lwm yog ua tiav.
• Isotonic contraction tshwm sim nyob rau hauv nruab nrab ntawm ib qho contraction thaum isometric contraction tshwm sim thaum pib thiab xaus ntawm tag nrho cov contractions.
• Thaum lub sij hawm cov leeg nqaij contractions, isometric theem nce thaum load nce whereas isotonic theem txo thaum load nce.
