a: A hormone ~
b: microscopic key
What:
"Every cell in the body contains receptors-essentially tiny locks-on its surface. A hormone is like a microscopic key floating in the bloodstream: When it finds a matching lock, it binds to the receptor and triggers the cell to do something, such as grow or divide."
Useful?
Writer: Gary Taubes
LCC:
Where:
Date: Feb 21 2014 4:00 PM
# 5002 Critique Analogy