In a Person Who Does NOT Have Cystic Fibrosis,what Is

Multiple Choice

In a person who does NOT have cystic fibrosis,what is the related normal condition?

A) mucus slides easily over epithelial surfaces and can more easily be expelled
B) osmotic balance in tissues is maintained by pumping sodium out of cells and chloride into cells
C) pH balances are maintained by pH buffers, mainly the bicarbonate ion
D) muscle fibers contract in coordination allowing smooth whole muscle contractions
E) plasma membranes function properly to allow nonpolar molecules to diffuse into and out of the cells