A characteristic of the human eye that enables the cornea to be transplanted with a 90% success rate is that _____. (Select all that apply.)
a. antigen-presenting cells in the eye do not express the co-stimulatory molecule B7
b. the cornea is not vascularized
c. anterior-chamber-associated immune deviation (ACAID) establishes a state of tolerance in the eye
d. only regulatory T cells express the adhesion molecules necessary to enter the cornea
e. the aqueous humor of the anterior chamber contains TGF-?, which downregulates CD40 and inhibits IL-12 secretion.
b, c, e
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Fill in the blank(s) with correct word
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