1. Which statement is TRUE?
a. A cell placed in an isotomic solution will swell.
b. A cell placed in a hypotonic solution will swell.
c. A cell placed in a hypotonic solution will shrink.
d. A cell placed in a hypertonic soluction will remain the same size.
e. A cell placed in a hypotonic solution will remain the same size.
2. Which statement is true?
a. The movement of solvent occurs from a hypotonic solution to an isotonic solution.
b. The net movement from an isotonic to a hypotonic solution involves the movement of solute molecules only.
c. The concentration of the solute is greater in an isotonic solution than in a hypertonic solution.
d. The concentration of the solvent is greater in a hypertonic solution than in an isotonic solutions.
e. Osmosis involves only hypertonic solutions.
1. b
hypo swelling
hyper skinny
iso same
the second one is correct
To determine the correct answer to each question, let's break down the options and explain the concepts involved.
1. In order to understand this question, we need to know the definitions of isotonic, hypotonic, and hypertonic solutions.
- Isotonic solution: A solution where the concentration of solutes is equal to that inside the cell. It has the same osmotic pressure, so there is no net movement of water into or out of the cell.
- Hypotonic solution: A solution where the concentration of solutes is lower than that inside the cell. It has a lower osmotic pressure, causing water to move into the cell, resulting in cell swelling.
- Hypertonic solution: A solution where the concentration of solutes is higher than that inside the cell. It has a higher osmotic pressure, causing water to move out of the cell, resulting in cell shrinking.
Now, let's analyze the options:
a. A cell placed in an isotonic solution will swell.
This statement is false because an isotonic solution has the same concentration of solutes as the cell, causing no net movement of water. Therefore, the cell will not swell.
b. A cell placed in a hypotonic solution will swell.
This statement is true because a hypotonic solution has a lower concentration of solutes compared to the cell. The lower osmotic pressure causes water to move into the cell, resulting in cell swelling.
c. A cell placed in a hypotonic solution will shrink.
This statement is false because a hypotonic solution will cause water to move into the cell, resulting in cell swelling, not shrinking.
d. A cell placed in a hypertonic solution will remain the same size.
This statement is false because a hypertonic solution has a higher concentration of solutes compared to the cell. The higher osmotic pressure causes water to move out of the cell, resulting in cell shrinking.
e. A cell placed in a hypotonic solution will remain the same size.
This statement is false because a hypotonic solution will cause water to move into the cell, resulting in cell swelling, not remaining the same size.
Therefore, the correct answer is:
b. A cell placed in a hypotonic solution will swell.
2. Now, let's analyze the options for the second question:
a. The movement of solvent occurs from a hypotonic solution to an isotonic solution.
This statement is true because in osmosis, the solvent (usually water) moves from a hypotonic solution, where the solute concentration is lower, to an isotonic solution, where the solute concentration is equal. This equalizes the concentration gradient.
b. The net movement from an isotonic to a hypotonic solution involves the movement of solute molecules only.
This statement is false because in osmosis, the net movement of solvent (water) occurs from an area of lower solute concentration (hypotonic solution) to an area of higher solute concentration (hypertonic solution). It is not limited to the movement of solute molecules.
c. The concentration of the solute is greater in an isotonic solution than in a hypertonic solution.
This statement is false because the concentration of solute in an isotonic solution is equal to that in a hypertonic solution. The isotonic solution has the same concentration as the cell, while the hypertonic solution has a higher concentration.
d. The concentration of the solvent is greater in a hypertonic solution than in an isotonic solution.
This statement is true because in a hypertonic solution, the concentration of solutes is higher, resulting in a lower concentration of solvent (water) compared to an isotonic solution.
e. Osmosis involves only hypertonic solutions.
This statement is false because osmosis can occur between any two solutions that have different solute concentrations, whether it's hypertonic, hypotonic, or isotonic.
Therefore, the correct answer is:
a. The movement of solvent occurs from a hypotonic solution to an isotonic solution.