Pharmacodynamics and Drug Receptors
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Questions and Answers

What determines the concentration of a drug at its site of action?

  • Drug metabolism
  • Drug excretion routes
  • Pharmacodynamics (correct)
  • Pharmacokinetics

What type of molecule serves as drug binding targets in addition to proteins?

  • Steroids
  • DNA (correct)
  • Lipids
  • Carbohydrates

Which type of drug mimics the effects of endogenous regulators of the receptor it binds to?

  • Noncompetitive inhibitor
  • Antagonist
  • Competitive inhibitor
  • Agonist (correct)

What is the most common route for drug excretion?

<p>Through the kidney and out of the body in urine (C)</p> Signup and view all the answers

What is the effect of an antagonist on the function of a receptor?

<p>Prevents the effect of endogenous agonists (B)</p> Signup and view all the answers

What two important properties do pharmacologic antagonists have?

<p>Do not elicit a biologic response in the absence of an agonist (D)</p> Signup and view all the answers

Why is it important for drugs to be reasonably hydrophilic for kidney excretion?

<p>To facilitate their excretion in urine (C)</p> Signup and view all the answers

What impact does impaired kidney function have on drug elimination?

<p>Reduces ability to eliminate hydrophilic drugs (B)</p> Signup and view all the answers

How can the effects of a competitive pharmacologic antagonist be overcome?

<p>By adding more agonist (D)</p> Signup and view all the answers

Which organ is responsible for most of the enzymatic drug-metabolizing reactions?

<p>Gastrointestinal tract and liver (D)</p> Signup and view all the answers

What is a common consequence of drugs inhibiting drug-metabolizing enzymes?

<p>Increased drug-drug interactions (C)</p> Signup and view all the answers

According to pharmacology, what relationship exists between a drug's concentration at its site of action and its action?

<p>A concentration-response relationship (C)</p> Signup and view all the answers

What does pharmacokinetics primarily concern?

<p>The effects of the body on the administered drug (C)</p> Signup and view all the answers

Which of the following is NOT a process involved in pharmacokinetics?

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

What is first-pass metabolism in relation to drug administration?

<p>It refers to the metabolism of drugs before they enter the bloodstream (D)</p> Signup and view all the answers

Which route of drug administration allows for direct absorption into the systemic venous circulation?

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

What can affect the rate and efficiency of drug absorption?

<p>Gastric emptying and tablet disintegration (A)</p> Signup and view all the answers

Which process involves movement of drug molecules through different body compartments and barriers?

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

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