Simplify the Expression

question 213

Multiple Choice

Simplify the expression. Assume that the variable has positive values.

---

Definitions:

Metabolism

The set of life-sustaining chemical reactions in organisms to convert food into energy, and build or maintain their cells.

First Messenger

Chemical signal, such as a peptide hormone, that binds to a plasma membrane receptor protein and alters the metabolism of a cell because a second messenger is activated.

Second Messenger

Chemical signal, such as cyclic AMP, that causes the cell to respond to the first messenger—a hormone bound to a plasma membrane receptor protein.

Peptide Hormone

Type of hormone that is a protein, a peptide, a glycoprotein, or is derived from an amino acid.