Question

if a solution outside a cell is more concentrated so that the cell loses water to its environment, the external solution is said to be ____________ to the cell contents.
o a hypertonic
o b in equilibrium
o c isotonic
o d hypotonic
question 15 (1 point)
a bean has been dropped in some distilled water (100% water, 0% solute). which way will the water molecules move as you cook the bean in the water? why?
o a both into and out of the bean equally
o b out of the bean, because of diffusion
o c no movement will occur.
o d into the bean, because of osmosis

Explanation:

• Question 14:
• A hypertonic solution has a higher solute concentration compared to the inside of the cell. According to the principles of osmosis, water moves from an area of lower solute concentration (inside the cell) to an area of higher solute concentration (outside the cell) when the external solution is hypertonic.
• An isotonic solution has the same solute concentration as the cell, so there is no net movement of water. A hypotonic solution has a lower solute concentration than the cell, causing water to move into the cell. "In equilibrium" is not a standard term for describing the relationship between the cell and the external solution in this context.
• Question 15:
• Distilled water is a hypotonic solution relative to the bean (which has some solutes inside). Osmosis is the movement of water molecules from an area of higher water concentration (distilled water, which has a high water concentration as it has 0% solute) to an area of lower water concentration (inside the bean, which has some solutes and thus relatively less water compared to the distilled water).
• Option a (both into and out equally) would be the case for an isotonic solution. Option b (out of the bean) is incorrect as water moves into the bean in a hypotonic situation. Option c (no movement) is wrong because osmosis will occur due to the concentration gradient.

Answer:

• Question 14: A. hypertonic
• Question 15: D. into the bean, because of osmosis