How to Superantigens work?

Allows MHC/TCR binding without antigen present, super-stimulating the T-cells

Increase the presentation of antigens by MHC, super-stimulating the T-cells

Prevents T cell activation by destroying TCR's

Why are Superantigens dangerous

Which causes T-Cells to over-release cytokins, causing shock like symptoms

They secreted during normal cell function

They're secreted during cell lysis

They're expressed on the cell surface

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1What is MHC?
1. APresents antigens to T-cell on antigen presenting cells
2. BReceives antigens from T-cells to antigen presenting cells
2TCR's- T Cell Receptors that detect antigens presented by antigen presenting cells
1. AVerdadero
2. BFalso
3Presentation of antigens through MCH/TCR activates the T-cell
1. AVerdadero
2. BFalso
4How to Superantigens work?
1. AIncrease the presentation of antigens by MHC, super-stimulating the T-cells
2. BAllows MHC/TCR binding without antigen present, super-stimulating the T-cells
3. CPrevents T cell activation by destroying TCR's
5Why are Superantigens dangerous
1. AThey prevent T-Cell activation
2. BThe over-activate T-Cells
3. CWhich causes T-Cells to over-release cytokins, causing shock like symptoms
6Exotoxins are secreted during cell lysis
1. AVerdadero
2. BFalso
7Which of the following are capable of producing Endotoxins?
1. AGram +ve
2. BGram -ve
8What happens to exotoxins?
1. AThey're secreted during cell lysis
2. BThey secreted during normal cell function
3. CThey're expressed on the cell surface
9Exotoxins tend to be produced by Gram +ve bacteria
1. AVerdadero
2. BFalso

Descripción: (Skin Infections) Medical Microbiology Test sobre Super-Antigens & Toxins, creado por gina_evans0312 el 06/02/2014.
Autor: gina_evans0312
Idioma: English
Visitas: 450
Etiquetas: basics medical microbiology medical microbiology skin infections
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