Super-Antigens & Toxins

gina_evans0312
Quiz by gina_evans0312, updated more than 1 year ago
gina_evans0312
Created by gina_evans0312 almost 6 years ago
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Description

Medical Microbiology (Skin Infections) Quiz on Super-Antigens & Toxins, created by gina_evans0312 on 02/06/2014.
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Resource summary

Question 1

Question
What is MHC?
Answer
  • Presents antigens to T-cell on antigen presenting cells
  • Receives antigens from T-cells to antigen presenting cells

Question 2

Question
TCR's- T Cell Receptors that detect antigens presented by antigen presenting cells
Answer
  • True
  • False

Question 3

Question
Presentation of antigens through MCH/TCR activates the T-cell
Answer
  • True
  • False

Question 4

Question
How to Superantigens work?
Answer
  • Increase the presentation of antigens by MHC, super-stimulating the T-cells
  • Allows MHC/TCR binding without antigen present, super-stimulating the T-cells
  • Prevents T cell activation by destroying TCR's

Question 5

Question
Why are Superantigens dangerous
Answer
  • They prevent T-Cell activation
  • The over-activate T-Cells
  • Which causes T-Cells to over-release cytokins, causing shock like symptoms

Question 6

Question
Exotoxins are secreted during cell lysis
Answer
  • True
  • False

Question 7

Question
Which of the following are capable of producing Endotoxins?
Answer
  • Gram +ve
  • Gram -ve

Question 8

Question
What happens to exotoxins?
Answer
  • They're secreted during cell lysis
  • They secreted during normal cell function
  • They're expressed on the cell surface

Question 9

Question
Exotoxins tend to be produced by Gram +ve bacteria
Answer
  • True
  • False
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