BIO202H5 Lecture 4: Lec 4 (Part 1) - Jan 28
Document Summary
Test info: 11:00-noon (second hour, in rst hour it will be review, 25 mc, 5 short answer (25, one paragraph choice (choose one from 2, 2 ll-in the blanks question, 2 labelling questions. Hypertonic solution: more salt is in the outside environment and more water is is inside the animal, so water leaves the cell and moves outside to equalize the salt concentration, results in shrinking of cell. Hypotonic solution: more salt inside the cell than in the environment, water moves from the environment and into the cell, results in enlargement of the cell, could lead to bursting of cell. Isotonic: the cell and environment is in equilibrium as salt concentration is equal. Challenges for animals in freshwater, saltwater, terrestrial: saltwater. Gaining salt, losing water as higher solute concentration in environment: freshwater. Gaining water, as more solute concentration inside the cell than in environment: terrestrial. Ion balance in freshwater: cell is hypertonic to its environment.
