Anatomy & Physiology: Chapter 2 Chemistry of Life

Front

What is the atomic number?

Back

The atomic number is equal to the number of protons and/or electrons in an atom.

Front

What percentage of the human body weight is water?

Back

About 65% of the human body weight is water.

Front

What cannot be broken down into simpler substances and is made of entirely one type of atom?

Back

An element.

Front

What is a compound that disassociates in water to form hydrogen ions?

Back

An acid.

Front

What type of carbohydrate is glycogen?

Back

Glycogen is a polysaccharide.

Front

What is the basic unit of matter?

Back

An atom.

Front

What is the difference between an element and a compound?

Back

An element consists of one type of atom, while a compound consists of two or more different types of atoms chemically bonded together.

Front

What is the pH scale used for?

Back

The pH scale is used to measure the acidity or alkalinity of a solution.

Front

What is a buffer?

Back

A buffer is a solution that resists changes in pH when an acid or base is added.

Front

What are the four main types of macromolecules?

Back

The four main types of macromolecules are carbohydrates, lipids, proteins, and nucleic acids.