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Physiological saline is 0.9% NaCl. Nurse Ima Fool is a bit distracted and makes a 9.0% NaCl solution. The tonicity of the solution is_ ____compared to inside a cell and would cause the patient's red blood cells to undergo

A.

isotonic; nothing

B.

hypotonic; crenation

C.

hypertonic; crenation

D.

hypertonic: lysis

Answer and Explanation

The Correct Answer is C

A. isotonic; nothing: Isotonic means equal solute concentration. 0.9% NaCl is isotonic; 9.0% is much higher, so not isotonic.
B. hypotonic; crenation: A hypotonic solution has less solute than the cell. Crenation (shriveling) occurs in a hypertonic solution.
C. hypertonic; crenation: A 9.0% NaCl solution is hypertonic (more solutes than inside the cell). Water moves out of red blood cells, causing them to shrink or crenate.
D. hypertonic; lysis: Lysis (bursting) occurs in hypotonic solutions, where water enters the cell.


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Related Questions

Correct Answer is C

Explanation

A. covalent: This is too general. Covalent bonds involve shared electrons, but do not specify if sharing is equal or unequal.
B. ionic: Ionic bonds involve transfer of electrons, typically between metals and nonmetals. Carbon and oxygen share electrons.
C. polar covalent: A polar covalent bond involves unequal sharing of electrons. Electrons spend more time around oxygen because it is more electronegative than carbon.
D. hydrogen: A hydrogen bond is an intermolecular force, not a bond between carbon and oxygen atoms.

Correct Answer is C

Explanation

A. a colloid: A colloid has larger particles than a solution, but they do not settle out (e.g., milk).
B. a solution: In a solution, particles are completely dissolved and remain evenly distributed (e.g., salt water).
C. a suspension: In a suspension, particles are large, do not dissolve, and will settle out over time (e.g., muddy water).
D. a solute: A solute is a substance dissolved in a solvent-not a type of mixture.

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