Madrid PAU Biology Practice Questions - Madrid PAU Biology Examination - UCM & Public Universities (Biología 2o Bachillerato 2026) Exam

When red blood cells (erythrocytes) are placed in a hypertonic NaCl solution, what cellular phenomenon occurs?

Water leaves the cells by osmosis, causing them to shrink and undergo crenation Water enters the cells by osmosis, causing them to swell and undergo osmotic lysis (hemolysis) Solutes actively pump out of the cells until turgor pressure equals osmotic pressure The cell wall exerts wall pressure to prevent any net movement of water

Correct Answer:

Water leaves the cells by osmosis, causing them to shrink and undergo crenation

Access more questions from this quiz

Continue to Madrid PAU Biology Practice Questions - Madrid PAU Biology Examination - UCM & Public Universities (Biología 2o Bachillerato 2026) Exam for more practice questions and the full quiz experience.

Access More Questions