Cov txheej txheem:
Video: Yam tshuaj twg ua rau cov hlab ntsha thiab venous dilation?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Vasodilator tshuaj tuaj yeem raug cais raws li lawv qhov chaw ua haujlwm ( cov hlab ntsha piv cov leeg ntshav ) los yog los ntawm kev ua haujlwm. Ib txhia tshuaj feem ntau dilate cov hlab ntsha tsis kam ( arterial dilators ; Piv txwv li, hydralazine), thaum lwm tus feem ntau cuam tshuam cov leeg ntshav capacitance hlab ntsha ( venous dilators ; Piv txwv li, nitroglycerine).
Kuj nug, cov tshuaj twg ua rau cov hlab ntsha loj thiab leeg ntshav?
Vasodilators kho ntau yam mob, suav nrog ntshav siab. Xav paub ntau ntxiv txog cov tshuaj no. Vasodilators yog cov tshuaj uas qhib (nthuav) cov hlab ntsha. Lawv cuam tshuam cov leeg hauv cov phab ntsa ntawm koj cov hlab ntsha thiab cov leeg, tiv thaiv cov leeg los ntawm kev zawm thiab phab ntsa los ntawm nqaim.
Ib tug kuj yuav nug, ua li cas koj dilate koj cov hlab ntsha? Cov nplooj ntsuab zoo li spinach thiab collard zaub ntsuab muaj nitrates, uas koj lub cev hloov mus rau hauv nitric oxide, muaj zog vasodilator. Noj cov zaub mov uas nplua nuj nitrate tuaj yeem pab txhim kho kev ncig los ntawm dilating cov hlab ntsha, tso cai rau koj cov ntshav ntws yooj yim dua.
Hauv qhov no, cov tshuaj twg yog vasodilators?
Piv txwv ntawm cov hlab ntsws vasodilators suav nrog:
- Cov pa.
- Nitric oxide.
- Nitroprusside (Nipride, Nitropress)
- Sildenafil (Revatio, Viagra)
- Tadalafil (Adcirca, Cialis)
- Bosentan (Tracleer)
Dab tsi ua rau dilation ntawm cov hlab ntsha?
Nws tshwm sim los ntawm kev so ntawm cov leeg nqaij leeg hauv lub cev lub nkoj phab ntsa, tshwj xeeb tshaj yog nyob rau hauv cov hlab ntsha loj, cov hlab ntsha loj, thiab cov hlab ntsha me me. Thaum twg cov hlab ntsha nthuav dav , kev khiav ntshav tau nce ntxiv vim qhov txo qis hauv cov hlab ntshav tiv thaiv thiab nce ntxiv hauv lub plawv.
Pom zoo:
Hom hlab ntshav twg txuas cov hlab ntsha thiab cov hlab ntshav?
Hom hlab ntsha Capillaries yog feeb nyias-walled hlab ntsha uas txuas cov hlab ntsha thiab venules; Nws yog los ntawm cov capillaries uas cov as-ham thiab cov pov tseg tau pauv ntawm cov ntshav thiab cov ntaub so ntswg ntawm lub cev
Cov hlab ntsha thiab cov hlab ntsha nyob qhov twg?
Txawm hais tias txoj hlab ntsha yog ib txwm ntseeg tias taug kev hauv qhov zawj ntawm qhov tsis zoo ntawm tus tav nrog rau cov hlab ntsha thiab cov leeg leeg, cov hlab ntsha kuj tseem tuaj yeem nyob nruab nrab ntawm cov tav. Cov paj hlwb intercostal nyob tob rau hauv cov leeg nqaij intercostal thiab sab nraud rau lub pleura
Cov hlab ntsha hlab ntsha thiab cov hlab ntshav muaj dab tsi?
Cov hlab ntsha nqa ntshav tawm ntawm lub plawv; Lub ntsiab hlab ntsha yog aorta. Capillaries nqa ntshav tawm ntawm lub cev thiab pauv cov as-ham, pov tseg, thiab oxygen nrog cov ntaub so ntswg ntawm qib cellular. Cov leeg ntshav yog cov hlab ntshav uas coj cov ntshav rov qab los rau hauv lub plawv thiab tso ntshav tawm ntawm cov kabmob thiab cov ceg
Puas yog Neuroglia tsim cov hlab ntsha hauv cov hlab ntsha hauv nruab nrab cov hlab ntsha?
Muaj plaub hom neuroglia pom nyob hauv nruab nrab lub paj hlwb: Astrocytes - tswj cov ntshav lub hlwb teeb meem thiab khaws cov tshuaj ib puag ncig los ntawm kev siv cov ions rov qab thiab cov tshuaj xa xov mus rau lub cev. Oligodendrocytes - myelinate axons nyob rau hauv lub hauv nruab nrab lub paj hlwb thiab muab tag nrho cov txheej txheem txheej txheem
Vim li cas peb thiaj sau cov ntshav los ntawm cov hlab ntsha thiab tsis yog los ntawm cov hlab ntsha?
Cov leeg yuav tsum tau li qub kom cov ntshav ntws mus rau lub plawv. Theses li qub yog qhov tshwj xeeb hauv ob txhais ceg thiab caj npab. Lawv tawm tsam lub ntiajteb txawj nqus los tiv thaiv cov ntshav rov qab los. Cov hlab ntsha tsis xav tau li qub vim tias lub siab los ntawm lub plawv ua kom cov ntshav ntws los ntawm lawv mus rau ib qho