Super-Antigens & Toxins

Descripción

(Skin Infections) Medical Microbiology Test sobre Super-Antigens & Toxins, creado por gina_evans0312 el 06/02/2014.
gina_evans0312
Test por gina_evans0312, actualizado hace más de 1 año
gina_evans0312
Creado por gina_evans0312 hace alrededor de 10 años
374
1

Resumen del Recurso

Pregunta 1

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

Pregunta 2

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

Pregunta 3

Pregunta
Presentation of antigens through MCH/TCR activates the T-cell
Respuesta
  • True
  • False

Pregunta 4

Pregunta
How to Superantigens work?
Respuesta
  • 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

Pregunta 5

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

Pregunta 6

Pregunta
Exotoxins are secreted during cell lysis
Respuesta
  • True
  • False

Pregunta 7

Pregunta
Which of the following are capable of producing Endotoxins?
Respuesta
  • Gram +ve
  • Gram -ve

Pregunta 8

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

Pregunta 9

Pregunta
Exotoxins tend to be produced by Gram +ve bacteria
Respuesta
  • True
  • False
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