Cellular Interactions with the Environment

Question 1 • FL-2002040-M/J Comprehensive Science 1 CR

A scientist put red blood cells in water that contained salt. Over time, the red blood cells burst. What is most likely true?

Answer

The concentration of water inside the cell was greater than in the salt water.

There was a higher concentration of salt in the water than in the cells.

There was a lower concentration of salt in the water than in the cells.

The concentration of water in the cells and salt water were equal.

Explanation

Water moves across the cell membrane from an area with a higher water concentration (lower salt concentration) to one with a lower water concentration (higher salt concentration). If the red blood cells burst, water must have moved into them, so the surrounding water had a lower salt concentration than the cells. Therefore, choice C is correct.

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