an example of diffusion. (a)true (b)false __________ 3.Oxygen in the lungs moves into the bloodstream and carbon dioxide moves in the opposite direction. This is an example of diffusion. (a)true (b)false
B. Osmosis Select the correct lettered answer in questions 4–8. __________ 4.A test tube with blood in it has a particular solution added to it. After several minutes, the solution is not clear anymore but becomes red. Which solution was added to the blood to obtain this result? (a)0.9% saline (b)5% saline (c)distilled water __________ 5.A 0.8% saline solution would be ____ to the cytosol of a cell. (a)hypotonic (b)hypertonic (c)isotonic __________ 6.If a 50% sugar solution had been used in the dialysis bag in Activity 2, there would be a faster rate of osmosis. (a)true (b)false 7_____ If you placed a peeled apple or potato in a 5% salt solution, it would ____ (a)gain weight (b)lose weight (c)stay the same weight __________ 8.A person's hands become wrinkled after spending a long, relaxing time in the tub. Tub water does not have as many solutes in it compared with the human body. The hands look wrinkled because ____. (a)the tub water is hypotonicto body cells and water entersthe cells (b)the tub water is hypotonicto body cells and water leavesthe cells (c)the tub water is hypertonicto body cells and water entersthe cells (d)the tub water is hypertonicto body cells and water leavesthe cells C. Application 9When a person becomes dehydrated, the amount of water in extracellular fluids such as blood decreases, causing the solute concentration of these fluids to increase. State whether osmosis results in water entering or leaving cells. 10Severe vomiting and diarrhea cause a loss of water and solutes from extracellular fluids. If a person was given only water, what effect would this have on the solute concentration of extracellular fluids? Would osmosis result in water entering or leaving cells?