Question

iii. vocabulary and concept review - passive transport
drag the words into the correct boxes

1. a solution has a higher concentration of solutes compared to the cytosol
2. large molecules and polar substances are moved across the plasma membrane via
3. since energy is not required, osmosis and diffusion are both methods of
4. describes the concentration of a solution relative to the concentration of the cytosol
5. a physical space across which there is a different concentration of a single substance is a
6. a has a lower concentration of solute relative to the cytosol.

7 is the diffusion of water through a semipermeable membrane according to the concentration gradient of water across the membrane.

1. an has the same concentration as the cytosol
2. the measure of the tonicity of a solution, or the total amount of solutes dissolved in a specific amount of solution is
3. in passive transport, substances always move their concentration gradient, from an area of concentration to an area of concentration

concentration gradient
isotonic solution
passive transport
osmolarity
facilitated diffusion
lower
down
tonicity
hypertonic
osmosis
higher
hypotonic solution

Explanation:

1. A hypertonic solution has a higher solute - concentration than the cytosol.
2. Facilitated diffusion is used for moving large molecules and polar substances across the plasma membrane.
3. Osmosis and diffusion are passive transport as they don't require energy.
4. Tonicity describes the relative solute concentration of a solution to the cytosol.
5. A concentration gradient is a physical space with different concentrations of a single substance.
6. A hypotonic solution has a lower solute - concentration relative to the cytosol.
7. Osmosis is the diffusion of water through a semi - permeable membrane based on the water concentration gradient.
8. An isotonic solution has the same concentration as the cytosol.
9. Osmolarity measures the tonicity of a solution or the total amount of solutes in a specific amount of solution.
10. In passive transport, substances move down their concentration gradient, from an area of higher concentration to an area of lower concentration.

Answer:

1. hypertonic
2. Facilitated diffusion
3. passive transport
4. Tonicity
5. concentration gradient
6. hypotonic solution
7. Osmosis
8. isotonic solution
9. Osmolarity
10. down, higher, lower