Drug Absorption Kinetics
30 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

Which form of a drug crosses membranes?

  • Polymerized form
  • Non-ionized form (correct)
  • Hydrogenated form
  • Ionized form
  • What is the effect of pH on drug absorption?

  • It determines whether the drug is ionized or non-ionized (correct)
  • It only affects water solubility
  • It influences the vascularity of the drug
  • It changes the surface area available for absorption
  • In what equilibrium do weak acids or weak bases exist?

  • Non-ionized or unionized forms (correct)
  • Non-polar forms
  • Only ionized forms
  • Fully charged forms
  • Which form of a drug is better renally excreted?

    <p>Ionized form</p> Signup and view all the answers

    What happens to ionized forms of drugs in the filtrate?

    <p>They are trapped and not excreted</p> Signup and view all the answers

    Why is lactulose useful in hepatic encephalopathy?

    <p>It causes ammonia to become ammonium</p> Signup and view all the answers

    What term is used to describe the action of the body on drugs?

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

    Which factor primarily determines the route(s) of drug administration?

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

    What is the main characteristic of a drug according to the text?

    <p>Biological function changes</p> Signup and view all the answers

    What does Vol. of distribution refer to in pharmacokinetics?

    <p>The extent of drug distribution in the body</p> Signup and view all the answers

    Which process involves the breakdown of drugs into metabolites?

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

    What is the purpose of understanding pharmacokinetics in medication administration?

    <p>Ensuring safe and accurate use of medications</p> Signup and view all the answers

    What is the main factor affecting the calculation of apparent volume of distribution (Vd)?

    <p>Percentage of drug bound to plasma proteins</p> Signup and view all the answers

    How does a high Vd value compare to a low Vd value?

    <p>High Vd indicates extensive tissue sequestration</p> Signup and view all the answers

    What is the significance of knowing the apparent volume of distribution (Vd) in the clinical setting?

    <p>Calculating the loading dose of a drug</p> Signup and view all the answers

    Which barrier limits the passage of only lipid-soluble drugs or those transported by facilitated diffusion to reach the brain?

    <p>Blood-brain barrier</p> Signup and view all the answers

    What factor influences the duration of action of CNS drugs more than the half-life after an initial dose?

    <p>Redistribution rate into fat tissues</p> Signup and view all the answers

    How does the blood/fat ratio influence the rate of redistribution and duration of action for a second dose of a drug?

    <p>Lower blood/fat ratio results in slower redistribution</p> Signup and view all the answers

    What is the process of distribution of a drug from the systemic circulation to organs and tissue?

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

    Which factor may increase the 'free fraction' of a drug in the body, potentially enhancing its effects?

    <p>Decreased plasma protein binding</p> Signup and view all the answers

    What is the term for the equilibrium between bound and free drug molecules in plasma?

    <p>Drug-Protein Complex</p> Signup and view all the answers

    Which type of drugs are prone to drug interactions due to their high plasma protein binding and narrow therapeutic range?

    <p>Drugs with high plasma protein binding and narrow therapeutic range</p> Signup and view all the answers

    What is the area under the curve (AUC) that represents the horizontally striped area known as?

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

    With oral drug administration, where do drugs get absorbed initially?

    <p>Into the portal circulation</p> Signup and view all the answers

    What type of reaction involves the addition of a water molecule with subsequent bond breakage?

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

    Which genetic polymorphism is associated with local anesthetics and succinylcholine?

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

    Monoamine oxidases are involved in the metabolism of which neurotransmitters?

    <p>Dopamine and serotonin</p> Signup and view all the answers

    Alcohols are metabolized to aldehydes and then to acids by which enzymes?

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

    Which phase of biotransformation involves conjugation with endogenous compounds?

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

    Depletion of which compound in the liver is associated with acetaminophen hepatotoxicity?

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

    More Like This

    Drug Absorption Kinetics
    15 questions

    Drug Absorption Kinetics

    StupendousRainforest avatar
    StupendousRainforest
    Oral Drug Absorption Factors Quiz
    10 questions
    Biopharmaceutics and Kinetics
    44 questions

    Biopharmaceutics and Kinetics

    TimeHonoredSaxophone avatar
    TimeHonoredSaxophone
    Use Quizgecko on...
    Browser
    Browser