Canary PAU Biology Practice Questions - Canary Islands PAU Biology Examination - ULPGC & ULL (Biología 2o Bachillerato 2026) Exam

What happens to a red blood cell (erythrocyte) when placed in a hypertonic NaCl solution?

Water enters the cell by osmosis, causing it to swell and undergo osmotic lysis Water leaves the cell by osmosis, causing it to shrink and become crenated NaCl enters the cell via active transport until equilibrium is established The cell membrane becomes impermeable and no net movement of water occurs

Correct Answer:

Water leaves the cell by osmosis, causing it to shrink and become crenated

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