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Questions and Answers
Which type of drugs block the action of neurotransmitters at the adrenergic receptors?
Which type of drugs block the action of neurotransmitters at the adrenergic receptors?
- Adrenergic agonists
- Sympatholytic drugs (correct)
- Sympathomimetic drugs
- Drugs interrupting the release of norepinephrine
Which neurotransmitter is primarily released by adrenergic neurons?
Which neurotransmitter is primarily released by adrenergic neurons?
- Dopamine
- Norepinephrine (correct)
- Serotonin
- Acetylcholine
Which family of receptors are found in the sympathetic nervous system?
Which family of receptors are found in the sympathetic nervous system?
- α receptors (correct)
- β receptors
- γ receptors
- δ receptors
Which adrenoceptor has a higher affinity for phenylephrine?
Which adrenoceptor has a higher affinity for phenylephrine?
What is the rank order of potency for α-adrenoceptors?
What is the rank order of potency for α-adrenoceptors?
Flashcards
Sympatholytic drugs
Sympatholytic drugs
Drugs that block the action of neurotransmitters at adrenergic receptors.
Norepinephrine
Norepinephrine
The primary neurotransmitter released by adrenergic neurons.
α receptors
α receptors
A family of receptors found in the sympathetic nervous system.
α1 receptor
α1 receptor
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Potency of α-adrenoceptors
Potency of α-adrenoceptors
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Study Notes
Adrenergic Receptors and Neurotransmitters
- Alpha blockers are a type of drug that block the action of neurotransmitters at adrenergic receptors.
- Norepinephrine (noradrenaline) is the neurotransmitter primarily released by adrenergic neurons.
Adrenoceptors in the Sympathetic Nervous System
- The sympathetic nervous system contains a family of receptors known as adrenoceptors.
Adrenoceptor Affinity and Potency
- The α1 adrenoceptor has a higher affinity for phenylephrine.
- The rank order of potency for α-adrenoceptors is: α1 > α2.
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