Qhov Tseem Ceeb - Vasoconstriction vs Vasodilation
Ntshav siab yog qhov tsis zoo ntawm kev noj qab haus huv uas qhia txog kev ua haujlwm ntawm kev ua pa, lub plawv dhia, oxygen saturation, lub cev kub thiab lwm yam. Nws yog lub zog ntawm cov ntshav ntws los ntawm cov hlab ntsha, cov ntaub so ntswg, thiab lub cev. Cov ntshav siab li qub ntawm tus neeg noj qab haus huv yog 120/80 mmHg. Qhov thaiv ntawm cov ntshav ntws yog hu ua tsis kam. Muaj ntau yam uas cuam tshuam rau cov ntshav khiav thiab ntshav siab. Ib qho tseem ceeb tshaj plaws yog txoj kab uas hla ntawm cov hlab ntsha. Vasodilation thiab vasoconstriction yog qhov tseem ceeb cuam tshuam rau cov ntshav siab. Lawv muaj feem xyuam rau cov kev hloov ntawm txoj kab uas hla ntawm cov hlab ntsha. Vasoconstriction hais txog qhov nqaim ntawm cov hlab ntsha. Vasodilation hais txog kev nthuav dav ntawm cov hlab ntsha. Qhov sib txawv tseem ceeb ntawm vasoconstriction thiab vasodilation yog tias vasoconstriction nce qhov kev tiv thaiv thiab txo cov ntshav ntws thaum vasodilation txo qhov tsis kam thiab ua rau cov ntshav ntws.
YVasoconstriction yog dab tsi?
Vasoconstriction yog hais txog cov txheej txheem ntawm txoj kab uas hla ntawm cov hlab ntsha. Lub vojvoog ntawm cov hlab ntsha los yog cov hlab ntsha yog txo qis vim vasoconstriction. Qhov no tshwm sim vim yog constriction ntawm cov leeg du nyob rau hauv cov phab ntsa ntawm cov hlab ntsha los yog arterioles. Lub lumen yuav nqaim dua thaum cov leeg du. Thaum lumen ua nqaim, thaj chaw saum npoo, uas tiv tauj cov ntshav, txo qis. Yog li ntawd, cov ntshav siab nce ntxiv vim yog vasoconstriction. Thaum qhov tsis kam ntawm cov hlab ntsha nce, cov ntshav khiav qis. Hauv cov hlab ntsha, venoconstriction txhim kho cov ntshav khiav. Thaum vasoconstriction nce ntshav siab hauv cov leeg, nws txhim kho cov ntshav txav los ntawm cov leeg. Yog li, venoconstriction nce cov ntshav rov qab mus rau lub plawv.
Daim duab 01: Vasoconstriction
Vasoconstriction muaj qhov tsis zoo, ua rau mob plawv vim ntshav siab. Tib neeg feem ntau noj tshuaj kom cov leeg hauv cov hlab ntsha so.
YVasodilation yog dab tsi?
Vasodiation yog qhov nthuav dav ntawm cov hlab ntsha. Vasodilation yog cov txheej txheem rov qab ntawm vasoconstriction. Raws li qhov tshwm sim ntawm vasodilation, cov nqaij ntshiv ntawm cov hlab ntsha ntawm cov phab ntsa tau so. Internal txoj kab uas hla ntawm cov hlab ntsha nce thaum lub sij hawm vasodilation. Thaum cov hlab ntsha ntawm phab ntsa yog dilated, thaj tsam ntawm lumen nce. Yog li ntawd, vascular kuj txo. Thaum tsis kam txo qis, nws txhim kho cov ntshav ntws los ntawm cov hlab ntsha. Cov ntshav siab kuj txo qis vim cov hlab ntsha dilation.
Daim duab 02: Vasodilation
Vasodilation yog txheej txheem tseem ceeb uas ua rau lub cev ua haujlwm zoo li qub. Cov tshuaj endogenous thiab tshuaj muaj peev xwm ua rau vasodilation hu ua vasodilators. Dilation ntawm cov hlab ntsha thiab arterioles muaj cov txiaj ntsig kho mob tseem ceeb hauv kev txo cov ntshav siab thiab lub plawv dhia. Li no, tshuaj lom neeg cov hlab ntsha dilators feem ntau yog siv los kho lub plawv tsis ua hauj lwm, lub cev thiab pulmonary hypertension thiab angina.
Daim duab 03: Vasodilation thiab Vasoconstriction
Qhov txawv ntawm Vasoconstriction thiab Vasodilation yog dab tsi?
YVasoconstriction vs Vasodilation |
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| Vasoconstriction yog hais txog kev nqaim ntawm cov hlab ntsha. | Vasodilation yog hais txog kev nthuav dav ntawm cov hlab ntsha. |
| Radius of Artery or arteriole | |
| Vasoconstriction txo lub vojvoog. | Vasodilation nce lub vojvoog. |
| Vascular Resistance | |
| Vasoconstriction nce vascular resistance. | Vasodilation txo vascular resistance. |
| ntshav siab | |
| Vasoconstriction nce ntshav siab. | Vasodilation txo cov ntshav siab. |
| xov tooj | |
| Vasoconstriction txo cov ntshav ntws. | Vasodilation nce ntshav ntws. |
Summary – Vasoconstriction vs Vasodilation
Vasodilation yog hais txog kev nthuav dav ntawm cov hlab ntsha thaum vasoconstriction hais txog kev nqaim ntawm cov hlab ntsha. Qhov no yog qhov txawv ntawm vasoconstriction thiab vasodilation. Ob txoj kev no cuam tshuam rau cov ntshav siab thiab ntshav khiav. Thaum lub sij hawm vasoconstriction, cov nqaij ntshiv ntawm cov hlab ntsha ntawm cov phab ntsa ntawm cov hlab ntsha ua rau txo qis hauv cov hlab ntsha. Nyob rau hauv tsis tooj mus rau qhov ntawd, vasodilation relaxes cov nqaij ntshiv ntawm cov hlab ntsha ntawm phab ntsa los ntawm kev ua kom lub sab hauv ntawm lub nkoj.
Download PDF Version of Vasoconstriction vs Vasodilation
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li cov ntawv sau tseg. Thov download PDF version ntawm no Qhov txawv Ntawm Vasoconstriction thiab Vasodilation.
