Biochemistry

Radioisotopes are chosen to have the longest half life possible.

• True
• False

Water has both a positive and negative side.  We call it ____.

• Polar
• Non-Polar
• Soluble
• Hydrogen Bond

Inorganic Compounds do NOT contain Hydrogen and ___ together.

• Potassium
• Oxygen
• Carbon
• Nitrogen

Water is ____ of your body.

• 60-80%
• 50%
• 25%
• 90-95%

Water attracts molecules and forms hydration layers.  It is also the best solvent in our body.  This is because of water's ...

• Polarity
• Cushioning
• High Heat Capacity
• Reactivity

Our cells do not instantly change temperature on a hot day.  This is mostly because of water's...

• Polarity
• Cushioning
• High Heat Capacity
• Reactivity

Salts are an ____ compound.  They have a positive and negative atom that make them up.

• Ionic
• Covalent
• Hydrogen
• Basic

____ are salts dissolved in the body that carry electrical impulses, like in the muscles and nervous system.

• Electrolytes
• Proteins
• Acids
• Monosaccharides

___ increase the presence of H⁺ ions and are below 7 on the pH scale.

• Acids
• Bases
• Electrolytes
• Salts

These chemicals help the body resist changes in pH.  They are particularly useful in the blood.

• Buffers
• Acids
• Bases
• Salts