Drug Metabolism and Pharmacological Actions Quiz
18 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the term for the phenomenon where a drug is conjugated either rapidly or slowly with acetyl-CoA in the human population?

  • Acetylation bimodality
  • Acetylation dichotomy
  • Acetylation polymorphism (correct)
  • Acetylation variation
  • Which populations are classified as slow acetylators based on differences in N-acetyltransferase activity?

  • Eskimos and Asians
  • Inuit and Africans
  • Egyptians and some Western European groups (correct)
  • Latin Americans and Indians
  • Which of the following is NOT true about slow acetylators?

  • Conjugate drugs with acetyl-CoA rapidly (correct)
  • Show an inadequate therapeutic response to standard drug doses
  • Display a bimodal distribution in the human population
  • More prone to developing adverse reactions
  • What is the main cause of acetylation polymorphism in individuals?

    <p>Genetic differences in N-acetyltransferase activity</p> Signup and view all the answers

    Which of the following drugs exemplifies acetylation polymorphism?

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

    What is the objective of methylation in the metabolic pathway?

    <p>Biosynthesis of endogenous compounds</p> Signup and view all the answers

    What type of metabolites does methylation generally not lead to?

    <p>Polar or water-soluble metabolites</p> Signup and view all the answers

    Which activated coenzyme is involved in methylation reactions?

    <p>S-adenosylmethionine (SAM)</p> Signup and view all the answers

    Which enzyme carries out O-methylation of important neurotransmitters like norepinephrine and dopamine?

    <p>Catechol-O-methyltransferase (COMT)</p> Signup and view all the answers

    Which type of methylation do transferases specifically methylating histamine, serotonin, and epinephrine not usually participate in?

    <p>Metabolism of xenobiotics</p> Signup and view all the answers

    What feature does COMT require for carrying out methylation reactions?

    <p>Catecholic functionality</p> Signup and view all the answers

    Which phase pathways are drugs and xenobiotics often metabolized by to give several metabolites?

    <p>Phase I and phase II pathways</p> Signup and view all the answers

    Which enzyme is primarily involved in methylation reactions in the body?

    <p>S-adenosylmethionine</p> Signup and view all the answers

    Which type of drug derivative undergoes methylation reactions to form methylated products?

    <p>Quaternary ammonium derivatives</p> Signup and view all the answers

    Which biological factor can affect the activity of methyltransferases and consequently alter drug metabolism?

    <p>All of the above</p> Signup and view all the answers

    Which factor determines the stereoselectivity of substrates in methylation reactions?

    <p>Substrate stereoselectivity</p> Signup and view all the answers

    Which factor can lead to the accumulation of toxic levels of a drug due to decreased metabolic elimination?

    <p>Decreased enzyme activity</p> Signup and view all the answers

    Which factor can decrease the intensity and duration of drug action as well as its efficacy?

    <p>Increased rate of metabolism</p> Signup and view all the answers

    More Like This

    Drug Metabolism
    19 questions

    Drug Metabolism

    SustainableSnake avatar
    SustainableSnake
    Pharmacological Metabolism Quiz
    16 questions

    Pharmacological Metabolism Quiz

    TroubleFreeStatistics avatar
    TroubleFreeStatistics
    Use Quizgecko on...
    Browser
    Browser