Adrenergic Receptor Blockers Quiz
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Questions and Answers

Which type of receptors does phenoxybenzamine non-selectively block?

  • Only α-2 receptors
  • Both α-1 and α-2 receptors (correct)
  • β1 receptors
  • Only α-1 receptors

    • What is the primary action of phenoxybenzamine?

  • Decreases peripheral vascular resistance (correct)
  • Increases sympathetic outflow
  • Decreases sympathetic outflow
  • Increases peripheral vascular resistance

    • What is the effect of phenoxybenzamine on blood pressure?

  • No effect on blood pressure
  • Causes fluctuations in blood pressure
  • Increases blood pressure
  • Decreases blood pressure (correct)

    • What is the duration of action of phenoxybenzamine?

    <p>Long duration of action</p> Signup and view all the answers

    For which condition can phenoxybenzamine be used for treatment?

    <p>Pheochromocytoma</p> Signup and view all the answers

    What is the primary mechanism of action of phenoxybenzamine?

    <p>Inhibition of α-adrenergic receptors</p> Signup and view all the answers

    What is the main effect of phenoxybenzamine on peripheral vascular resistance?

    <p>Decrease</p> Signup and view all the answers

    How does phenoxybenzamine affect blood pressure in the context of pheochromocytoma?

    <p>Decreases blood pressure</p> Signup and view all the answers

    What is the consequence of phenoxybenzamine's blockage of α2 receptors?

    <p>Tachycardia</p> Signup and view all the answers

    What is the unique aspect of phenoxybenzamine's binding to adrenergic receptors?

    <p>Irreversible binding</p> Signup and view all the answers

    What is the primary mechanism of action of phenoxybenzamine?

    <p>Irreversible binding to α1 and α2 receptors</p> Signup and view all the answers

    What is the primary effect of phenoxybenzamine on blood pressure?

    <p>Increase due to blocking of α2 receptors</p> Signup and view all the answers

    In the context of pheochromocytoma, how does phenoxybenzamine affect blood pressure?

    <p>It decreases blood pressure by non-selective α receptor blocking</p> Signup and view all the answers

    What is the unique aspect of phenoxybenzamine's binding to adrenergic receptors?

    <p>Irreversible covalent binding to adrenergic receptors</p> Signup and view all the answers

    For which condition can phenoxybenzamine be used for treatment?

    <p>Pheochromocytoma</p> Signup and view all the answers

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