Chimie AntiHTA 1 Flashcards

1
Q

Les rc adrénergiques sont des rc ….

A

métabotropiques couplés au protéines G

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2
Q

2 grandes catégories des rc adrénergiques

A

alpha

Beta

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3
Q

Chaque rc adrénergique est divisé en ……… dont les ……….. présentent de légères différences

A

sous-types
structures

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4
Q

sous-types de rc alpha

A

alpha 1 et alpha 2

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5
Q

En quoi diffèrent les sous-type alpha (alpha 1 et alpha 2) entre elles ?

A

structure
type de messager secondaire produit

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6
Q

différences entre alpha 1 et alpha 2:

A

Messagers produits:
- alpha 1 = inositol triphosphate (IP3) + DAG via Gq
- alpha 2 = cAMP via Gi

Lieu:
- alpha 1 = vaisseaux sanguins
- alpha 2 = SN

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7
Q

Sous types rc beta

A

beta 1, beta 2, beta 3

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8
Q

Différences entre beta 1, beta 2, beta 3

A

messagers: formation de cAMP via Gs pour les 3

Lieu:
beta 1: surtout coeur et rein
Beta 2: surtout bronches
Beta 3: adipose tissue, urinary tract…

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9
Q

sous-type de rc adrénergiques a/n vaisseaux
stimulation vs blocage

A

alpha 1

stimulation: VC
blocage: VD

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10
Q

sous-type rc adrenergique coeur + stimulation vs blocage

A

beta 1 bcp plus que beta 2

stimulation: effets inotrope + chronotrope positif
blocage: inverse

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11
Q

rc adrenergique a/n bronches + stimulation vs blocage

A

beta 2 bcp plus que beta 1

stimulation: BR
blocage: BC

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12
Q

rc adrenergique a/n reins + stimulation vs blocage

A

beta 1 plus que beta 2

stimulation: aug rénine
blocage: dim rénine

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13
Q

lieu principale des rc beta

A

coeur
reins
vasculature

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14
Q

Les rc …. sont presqu’exclusivement concentrés a/n du myocarde et son principalement responsables des effets … et …

A

beta 1
chronotropes
inotropes positifs

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15
Q

bloqueur de beta 1 effets

A

dim FC
dim force de contraction cardiac
inh libération rénine

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16
Q
A