At what ph was the enzyme most and least effective ? why?

You have to provide some more information, as different enzymes are best suited to different pHs as they operate in different parts of the body.

a chair, a bed, and a toothbrush

explanation:

i was told this before by a teacher, so yeah

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;