Question

15: Which is a natural chemical messenger for the
adrenergic receptor?

1.Acetylcholine
2.Dopamine
3.Serotonin
4.Noradrenaline​

Answer 1

Answer:

Noradrenaline

Explanation:

Noradrenaline acts as the messenger which can bind with the adrenergic receptor. This noradrenaline acts as the neurotransmitter which binds with the adrenergic receptor.

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Answer 2

Noradrenaline is a natural chemical messenger for the adrenergic receptor (option 4).

• Noradrenaline (Adrenaline) is released from the sympathetic nervous system. More precisely the target structure releases noradrenaline.
• Noradrenaline binds to the adrenergic receptors and it will have different effects depending on the receptor and the target structure.
• It increases contractile force which increases the heart's speed of contraction.
• There are 4 different types of receptors α1, α2, β1, β2.
• α1 and β1 stimulate the target structure while α2 and β2 inhibit the target structure.

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