A solution is a mixture of two or more substances that are physically blended but not chemically combined.

The term _____________ refers to a membrane that allows some things to pass through it, but not others.

__________ is the process in which __________ forces water and small solutes, such as salts, through narrow clefts between capillary cells.

Metabolism is the sum of __________ and __________.

Proteins perform all of the following functions except __________.

The constant appearance of new strains of influenza virus is an example of __________.

A solution that resists a change in pH when an acid or base is added to it is a(n) __________.

What level of structural hierarchy is represented by the letter E?

Which letter represents the effectorof this feedback loop?

An enzyme issubstrate-specific because of the shape of its __________.