![Cov leeg twg tuaj yeem txhawb nqa kev cog lus rau lub sijhawm ntev? Cov leeg twg tuaj yeem txhawb nqa kev cog lus rau lub sijhawm ntev?](https://i.answers-medical.com/preview/medical-health/13964501-which-muscle-can-sustain-contraction-for-long-periods-of-time-j.webp)
Video: Cov leeg twg tuaj yeem txhawb nqa kev cog lus rau lub sijhawm ntev?
![Video: Cov leeg twg tuaj yeem txhawb nqa kev cog lus rau lub sijhawm ntev? Video: Cov leeg twg tuaj yeem txhawb nqa kev cog lus rau lub sijhawm ntev?](https://i.ytimg.com/vi/y58f64IfGLk/hqdefault.jpg)
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Whereas lawv cog lus qeeb dua cov leeg nqaij , du myocytes tuaj yeem txuas ntxiv rau lub sijhawm ntev. Cov leeg nqaij feem ntau pom muaj nyob hauv cov phab ntsa ntawm cov kabmob hauv nruab nrog cev xws li cov hlab ntshav, cov plab zom zaub mov, lub zais zis, thiab lub tsev menyuam.
Tib neeg kuj nug, vim li cas lub sij hawm so ntev dua lub sij hawm contraction?
Ua raws li qhov latent lub sij hawm yog contraction theem nyob rau hauv uas lub shortening ntawm sarcomeres thiab hlwb tshwm sim. Tom qab ntawd los ntawm lub sijhawm so , ib lub sijhawm ntev dua vim nws yog passive, qhov tshwm sim ntawm kev thim rov qab vim yog cov ntsiab lus tseem ceeb ntawm cov leeg.
sustained contraction txhais li cas? Ib tug tetanic kev cog lus (tseem hu ua tetanized state, tetanus, lossis physiologic tetanus, tom kawg kom sib txawv ntawm tus kab mob hu ua tetanus) yog a txhawb nqa cov leeg kev cog lus evoked thaum lub cev muaj zog paj hlwb uas innervates ib pob txha pob txha emits kev ua tau zoo ntawm tus nqi siab heev.
Hauv qhov no, dab tsi txwv cov leeg ntawm kev cog lus?
Kev so ntawm a Cov leeg Fiber ntau. Ca++ ions raug tso rov qab rau hauv SR, uas ua rau tropomyosin rov kho qhov chaw khi ntawm cov actin strands. A cov leeg tej zaum kuj nres kev cog lus Thaum nws khiav tawm ntawm ATP thiab ua rau qaug zog. Kev tso tawm cov calcium ions pib cov leeg kev cog lus
Hom kev cog lus dab tsi cuam tshuam rau cov leeg nqaij ntev hloov raws li qhov nro tas li?
Isotonic contractions
Pom zoo:
Kev sib raug zoo ntawm kev txhawb nqa lub sijhawm thiab kev txhawb zog siab yog dab tsi?
![Kev sib raug zoo ntawm kev txhawb nqa lub sijhawm thiab kev txhawb zog siab yog dab tsi? Kev sib raug zoo ntawm kev txhawb nqa lub sijhawm thiab kev txhawb zog siab yog dab tsi?](https://i.answers-medical.com/preview/medical-health/13877529-what-is-the-relationship-between-stimulus-duration-and-stimulus-amplitude-j.webp)
Kev sib raug zoo ntawm kev txhawb nqa lub sijhawm thiab qhov dav tam sim no Tus nqi yog cov khoom lag luam ntawm qhov dav thiab ntev. Yog li yog tias lub sijhawm ntev ob npaug, koj yuav xav tau tsuas yog ib nrab ntawm qhov tam sim no kom coj daim nyias nyias mus rau qhov pib vim tias qhov me me tam sim no nyob rau qhov kev txhawb zog ntev dua muaj lub sijhawm los them rau daim nyias nyias
Qhov twg ntawm qhov sib npaug ntawm lub cev thiab kev txav mus los ntawm cov leeg leeg tuaj yeem tswj tau?
![Qhov twg ntawm qhov sib npaug ntawm lub cev thiab kev txav mus los ntawm cov leeg leeg tuaj yeem tswj tau? Qhov twg ntawm qhov sib npaug ntawm lub cev thiab kev txav mus los ntawm cov leeg leeg tuaj yeem tswj tau?](https://i.answers-medical.com/preview/medical-health/13926902-where-posture-balance-and-voluntary-muscle-movements-are-controlled-j.webp)
Lub cerebellum (nraub qaum ntawm lub hlwb) nyob tom qab ntawm lub taub hau. Nws txoj haujlwm yog txhawm rau tswj kev txav mus los ntawm cov leeg nqaij thiab tswj lub cev, sib npaug, thiab sib npaug
Cov leeg twg thaum sib cog lus yuav ua rau kom muaj huab cua ntau ntxiv hauv lub plab thoracic?
![Cov leeg twg thaum sib cog lus yuav ua rau kom muaj huab cua ntau ntxiv hauv lub plab thoracic? Cov leeg twg thaum sib cog lus yuav ua rau kom muaj huab cua ntau ntxiv hauv lub plab thoracic?](https://i.answers-medical.com/preview/medical-health/13957173-which-muscles-when-contracted-would-increase-the-volume-of-air-in-the-thoracic-cavity-j.webp)
Kev sib cais ntawm ob lub diaphragm (diaphragm flattens) thiab sab nraud sab nraud (rub cov tav tawm thiab tawm) yuav ua rau lub ntim ntawm kab noj hniav thoracic. Qhov no yuav ua rau huab cua txav mus rau hauv lub ntsws (kev tshoov siab)
Puas yog tag nrho cov hlab ntsha nqa cov ntshav oxygenated thiab cov leeg nqa cov ntshav deoxygenated?
![Puas yog tag nrho cov hlab ntsha nqa cov ntshav oxygenated thiab cov leeg nqa cov ntshav deoxygenated? Puas yog tag nrho cov hlab ntsha nqa cov ntshav oxygenated thiab cov leeg nqa cov ntshav deoxygenated?](https://i.answers-medical.com/preview/medical-health/14034971-do-all-arteries-carry-oxygenated-blood-and-veins-carry-deoxygenated-blood-j.webp)
Cov hlab ntsha ua ib feem ntawm lub circulatory system. Cov hlab ntsha nqa cov ntshav oxygenated tawm ntawm lub plawv mus rau cov ntaub so ntswg, tshwj tsis yog cov hlab ntshav hauv lub ntsws, uas nqa ntshav mus rau lub ntsws rau cov pa oxygen (feem ntau cov leeg ntshav nqa cov ntshav deoxygenated mus rau lub plawv tab sis cov leeg hauv ntsws nqa cov ntshav oxygenated ib yam)
Dab tsi kawm paub theorist hu rau kev nthuav qhia ntawm qhov kev txhawb nqa uas nce lossis tswj cov lus teb?
![Dab tsi kawm paub theorist hu rau kev nthuav qhia ntawm qhov kev txhawb nqa uas nce lossis tswj cov lus teb? Dab tsi kawm paub theorist hu rau kev nthuav qhia ntawm qhov kev txhawb nqa uas nce lossis tswj cov lus teb?](https://i.answers-medical.com/preview/medical-health/14144154-what-do-learning-theorist-call-the-presentation-of-a-stimulus-that-increases-or-maintains-a-response-j.webp)
Kev txhawb zog zoo qhov kev nthuav qhia ntawm qhov kev txhawb nqa uas nce lossis tswj tau cov lus teb