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

For which condition can phenoxybenzamine be used for treatment?

<p>Pheochromocytoma (C)</p> Signup and view all the answers

What is the primary mechanism of action of phenoxybenzamine?

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

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

<p>Decrease (D)</p> Signup and view all the answers

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

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

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

<p>Tachycardia (C)</p> Signup and view all the answers

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

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

What is the primary mechanism of action of phenoxybenzamine?

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

For which condition can phenoxybenzamine be used for treatment?

<p>Pheochromocytoma (C)</p> Signup and view all the answers

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