1) Which of the following best describes a mixture? a) A chemical reaction between two substances b) A physical combination of substances where each retains its own properties c) A substance in which particles are dissolved uniformly d) A homogenous substance with only one phase 2) What is the primary solvent in the human body? a) Oxygen b) Glucose c) Water d) Sodium chloride 3) Which of the following is a solute in blood plasma? a) Water b) Red blood cells c) Albumin d) Platelets 4) In a solution of saline used for IV fluids, what is the solute? a) Water b) Sodium chloride c) Potassium d) Glucose 5) A colloid solution is best defined as: a) A solution with a uniform distribution of solute particles b) A mixture where large particles settle out over time c) A mixture in which small particles remain suspended and do not settle d) A gas dissolved in a liquid 6) Which of the following describes a suspension? a) A liquid in which small particles are uniformly dissolved b) A mixture where particles are large enough to settle out over time c) A solution with solute particles that cannot be separated d) A mixture of gases dissolved in liquid 7) Which of the following is an example of a suspension in the human body? a) Blood cells suspended in plasma b) Glucose dissolved in blood c) Sodium chloride dissolved in water d) Proteins in plasma

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