Question

Think about how the immune system is organized, and how the various components functions. You will be provided with certain components of the immune system. Classify whether that component, as described, provides a 'non-specific' defense, 'provides specific defense against certain classes of microbes', or provides specific defense to a single microbe. Finally, the 4th choice will be an option to state that a particular component of the immune system, as described, provides 'no protection', by itself.

Question 31 options:

	The lymphatic system
	Toll like receptor 4- that recognized bacterial LPS
	A CD4+ T cell that recognizes a peptide derived from the influenza HA spike protein when it is bound to MHC-II on the surface of a B cell.
	IgA that coats the mucosal surfaces. Hint.. where did each one come from?
	Mucous/coughing/sneezing
	A single plasma cell- hint, where do these come from, what do they do, and how did they become what they are?
	Lysozyme
	Normal flora- ie, the bacteria that colonize your surfaces and digestive tract.
	Red blood cells
	Dendritic cells of the skin
	Neutrophils
	Fever
	Intact skin
	A single naive B cell
	Hydrochloric acid in the stomach

1.	Non- specific protection
2.	Specific protection to certain types of microbes.
3.	Specific protection for a single microbe
4.	No protection

Answer 1

Lymphatic system: specific immune response for certain types of microbes

Toll like receptors 4 that recognised bacterial LPS: specific immune response to certain types of microbes

A CD4+ T cell which recognises a .. . . . . . .. ..

. . ... Surfaces: specific immune response to a single microbe

Lysozyme: non specific protection

Mucous/ coughing/ sneezing: non specific protection

A single plasma cell: non specific protection

Normal flora: non specific protection

RBC: no protection

Dendritic cells of the skin: specific immune response for multiple antigens

Neutrophils:non specific

Fever: non specific

Intact skin: non specific

Single naive B Cell: no protection

Hydrochloric acid in the stomach: non specific