Home › AP Biology › Biology › Structure and Function of Plasma Membranes › When a cell sits in a hypertonic solution, water:
When a cell sits in a hypertonic solution, water:
AEnters the cell
BStops moving
CLeaves the cell
DTurns to solute
Answer & Solution
Correct answer: C. Leaves the cell
1. Hyper means the extracellular fluid has a higher osmolarity than the cytoplasm.
2. Higher osmolarity outside means the fluid contains less water than the cell does.
3. Because the cell has a relatively higher concentration of water, water will leave the cell.
4. That is the opposite of what happens in a hypotonic solution.
_Source: OpenStax Biology for AP(R) Courses (CC BY 4.0), Ch 5 'Structure and Function of Plasma Membranes', sections 5.1-5.4_
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