Chapter 2 - A&P

The atomic weight is only an average of relative weights of an atom and its isotopes, and it may vary from the weight of a specific isotope.

Emulsions and colloids are the same thing.

Chemical properties are determined primarily by neutrons.

A charged particle is generally called an ion.

Isotopes differ from each other only in the number of electrons contained.

About 60% to 80% of the volume of most living cells consists of organic compounds.

Lipids are a poor source of stored energy.

Current information theorizes that omega-3 fatty acids decrease the risk of heart disease.

Glucose is an example of a monosaccharide.

A molecule consisting of one carbon atom and two oxygen atoms is correctly written as CO2.

The lower the pH, the higher the hydrogen ion concentration.

Covalent bonds are generally less stable than ionic bonds.

Hydrogen bonds are comparatively strong bonds.

The fact that no chemical bonding occurs between the components of a mixture is the chief difference between mixtures and compounds.

Alpha particles, although relatively weak energy particles, are second only to smoking as a cause of lung cancer.

No chemical bonding occurs between the components of a mixture.

All organic compounds contain carbon.

A dipeptide can be broken into two amino acids by dehydration synthesis.

The pH of body fluids must remain fairly constant for the body to maintain homeostasis.

Mixtures are combinations of elements or compounds that are physically blended together but are not bound by chemical bonds.

Buffers resist abrupt and large changes in the pH of the body by releasing or binding ions.