Basic Anatomy

Which of the following is the smallest unit of matter that can participate in a chemical reaction?

• Molecule

• Organelle

• Atom

• Tissue

A molecule is formed when two or more _______ are linked together.

• Organs

• Tissues

• Atoms

• Cells

An acid is a substance that donates _______ in a chemical reaction.

• Protons

• Electrons

• Neutrons

• Ions

A base is a substance that accepts _______ in a chemical reaction.

• Protons

• Electrons

• Neutrons

• Ions

A buffer solution can resist changes in _______ by accepting or releasing protons.

• Temperature

• Pressure

• pH

• Light intensity

Which of the following is NOT a component of a body fluid?

• Water

• Electrolytes

• Proteins

• Dissolved gases

Electrolytes are important for maintaining _______ in the body.

• Muscle function

• Immunity

• Cell division

• All of the above

Which of the following electrolytes is crucial for nerve impulse transmission?

• Sodium

• Potassium

• Calcium

• Magnesium

Buffers in the blood help to maintain a blood pH of approximately _______.

• 5.0

• 7.4

• 9.0

• 11.0

Which of the following is NOT a primary buffer system in the blood?

• Bicarbonate buffer system

• Phosphate buffer system

• Protein buffer system

• Hemoglobin buffer system