Question

question 9 (1 point) if an animal cell is surrounded by a hypertonic solution, water moves out the cell by osmosis and the cell shrinks. water moves into the cell by osmosis and the cell swells up and bursts. water movement into and out the cell is balanced.

Explanation:

To solve this, we recall the concept of osmosis and tonicity. A hypertonic solution has a higher solute concentration (and thus lower water potential) than the animal cell's cytoplasm. By osmosis, water moves from an area of higher water potential (inside the cell) to lower water potential (outside, in the hypertonic solution). So water leaves the cell, causing it to shrink. The second option describes a hypotonic solution (water moves in, cell swells/bursts), and the third is an isotonic solution (balanced movement).

Answer:

A. water moves out the cell by osmosis and the cell shrinks.