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The Adrenergic System and Drug Quiz

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Questions and Answers

Which enzyme is responsible for the metabolism of norepinephrine (NA)?

MAO (correct)
DA
DOPA
Tyrosine

Where is norepinephrine (NA) synthesized?

Renal beds
Skeletal muscles
Smooth muscle of blood vessels
Adrenal medullary cells (correct)

Which adrenoreceptor is primarily responsible for vasoconstriction and a rise in blood pressure?

α1-adrenoreceptors (correct)
α2-adrenoreceptors
β1-adrenoreceptors
β2-adrenoreceptors

Which adrenoreceptor is mainly located in the smooth muscle of bronchi?

<p>β2-adrenoreceptors (B)</p> Signup and view all the answers

Which adrenoreceptor is prejunctional on nerve endings and causes inhibition of transmitter release?

<p>α2-adrenoreceptors (B)</p> Signup and view all the answers

Flashcards

Norepinephrine metabolism enzyme

Monoamine oxidase is responsible for breaking down norepinephrine.

Norepinephrine synthesis location

Norepinephrine is synthesized within the adrenal medullary cells.

Adrenoreceptor for vasoconstriction

α1-adrenoreceptors are responsible for vasoconstriction, leading to increased blood pressure.

Bronchial smooth muscle adrenoreceptor

β2-adrenoreceptors are mainly found in the smooth muscle of bronchi, causing bronchodilation.

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Adrenoreceptor inhibiting transmitter release

α2-adrenoreceptors are prejunctional and inhibit neurotransmitter release.