Toxicology: Mechanisms of Toxic Effects
12 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 outcome when the ultimate toxicant reacts with a host molecule, cell or tissue?

  • Immune response
  • Cellular repair
  • Enzymatic stimulation
  • Toxic injury (correct)

What type of compound is most likely to participate in covalent binding with a toxicant?

  • Lipophilic
  • Nucleophilic (correct)
  • Electrophilic
  • Hydrophobic

What is the result of covalent binding between a toxicant and a target molecule?

  • An adduct (correct)
  • A noncovalent interaction
  • An enzyme-substrate complex
  • A reversible bond

What is a potential consequence of covalent binding of toxicants to cellular proteins?

<p>Inhibition of vital enzyme reactions (A)</p> Signup and view all the answers

What type of interaction between toxicants and their targets involves the transfer of electrons?

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

What is a characteristic of electrophilic compounds?

<p>They are electron-seeking (A)</p> Signup and view all the answers

What is the result of covalent binding of toxicants to phospholipids?

<p>Direct damage to cellular or organelle membranes or lipid peroxidation (C)</p> Signup and view all the answers

What is a characteristic of an endogenous molecule that makes it a target for toxicants?

<p>High reactivity and steric configuration (C)</p> Signup and view all the answers

What is a common target for reactive metabolites?

<p>The enzyme that catalyzes their production (D)</p> Signup and view all the answers

What is the basis for the antithyroid effect of some nucleophilic xenobiotics?

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

What is required to conclusively identify a target molecule as being responsible for toxicity?

<p>The ultimate toxicant reaching an effective concentration at the target site, and altering the target in a way that is mechanistically related to the observed toxicity (A)</p> Signup and view all the answers

What is the effect of some xenobiotics on neurotransmitter receptors?

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

More Like This

Pharmacology and Toxicology Basics
10 questions
Pharmacology and Toxicology Overview
5 questions
Toxicology Basics
10 questions

Toxicology Basics

LuckierCornett avatar
LuckierCornett
Use Quizgecko on...
Browser
Browser