Video: Alpha thiab beta adrenergic receptors nyob qhov twg?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov hom ntawm khuv xim los yog cov tshuaj adrenergic receptors yog alpha, beta 1 thiab beta 2. Alpha- cov receptors nyob ntawm cov hlab ntsha. Thaum cov alpha receptor tau txhawb los ntawm epinephrine los yog norepinephrine, cov cov hlab ntsha nruj. Qhov no ua rau kom ntshav siab thiab cov ntshav rov qab mus rau lub plawv.
Hauv qhov no, qhov twg yog alpha 1 adrenergic receptors nyob?
Alpha 1 receptors yog cov classic postsynaptic alpha receptors thiab muaj nyob rau ntawm vascular du nqaij. Lawv txiav txim siab ob qho kev tiv thaiv arteriolar thiab cov leeg ntshav, thiab yog li BP. Alpha 2 cov receptors tau pom ob leeg hauv lub hlwb thiab nyob ib puag ncig. Hauv lub paj hlwb, lawv hloov pauv kev nkag siab zoo.
Kuj Paub, beta beta adrenergic receptors ua dab tsi? Cov no cov receptors feem ntau khi norepinephrine uas tau tso tawm los ntawm kev khuv leej adrenergic paj hlwb. Tsis tas li ntawd, lawv khi norepinephrine thiab epinephrine uas ncig hauv cov ntshav. Beta -adrenoceptors yog txuas rau Gs-proteins, uas ua rau adenylyl cyclase tsim cAMP los ntawm ATP.
Ib sab ntawm no, qhov sib txawv ntawm alpha thiab beta adrenergic receptors yog dab tsi?
Adrenergic receptors muaj ob hom tseem ceeb, uas yog, alpha thiab beta receptors . Alpha receptors feem ntau koom nrog hauv stimulation ntawm effector cell thiab constriction ntawm cov hlab ntsha. Ntawm qhov tod tes, cov beta receptors feem ntau koom nrog hauv so ntawm effector hlwb thiab dilatation ntawm cov hlab ntsha.
Cov beta 1 adrenergic receptors nyob qhov twg?
receptors nyob ntawm cov hlwb postsynaptic uas txhawb nqa los ntawm cov ANS tshwj xeeb fibers. Beta1 - cov tshuaj adrenergic receptors yog nyob hauv plawv, hos beta2- cov tshuaj adrenergic receptors yog nyob hauv cov leeg nqaij du ntawm bronchioles 'arterioles, thiab cov hlab ntsha hauv nruab nrog cev.
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