_____ is necessary for diffusion to take place. 

Water is _____.

Hydrogen atoms often lose an electron from the valence shell to form H+. In this ionic form, _____ electrons are in the valence shell of hydrogen.

The anatomical term that best describes a structure that is closer to the origin is _____.

Which pH is the weakest acid?

Hydrogen bonds give water _____.

_____ is the property of water that explains its ability to prevent sudden changes in body temperature.

____ is an example of a physiological study.

Hydrolysis is a form of _____.

The sum of all synthesis reactions in the body is _____.