Immunology

Question 1

what are the physical aspects to tears that keep pathogens out of the eye?

Answer 1

• the flushing ability of tears

- mucous layer-antiadhesive

Question 2

what immunological chemicals does tears contain?

Answer 2

lysozyme, lacoterrin and transferrin, complement, tear lipids, secretary IgA

Question 3

what are the immunologically cellular components of tears?

Answer 3

neutrophils, macrophages, conjuctival mast cells

Question 4

what is the only part of the eye that contains lymphatic drainage?

Answer 4

the conjuctiva

Question 5

what do dendritic cells in the conjuctiva act as?

Answer 5

antigen presenting cells

Question 6

what is meant by immune privilege?

Answer 6

areas of the body that are able to tolerate the introduction of antigens without eliciting an inflammatory immune response

Question 7

what is sympathetic ophthalmia?

Answer 7

rare, bilateral, granulomotous uveitis due to trauma or surgery

Question 8

what is thought to be the process behind sympathetic ophthalmia?

Answer 8

secondary to the development of an auto-immune reaction to ocular antigens that are exposed during the traumatic event

Question 9

primary mediators in sympathetic ophthalmia?

Answer 9

T cells