Cellular Transport

A freshwater plant is placed in a container of saltwater. What will most likely happen to the cells of the plant?

• They will shrink because water will move out of them

• They will shrink because salt will move out of them.

• They will swell because water will move into them

• They will swell because salt will move into them

If energy is needed to move materials into or out of a cell, what is most likely occurring?

• passive transport

• diffusion

• osmosis

• active transport

Which would be the best evidence that a cell is using active transport to move a substance across its cell membrane?

• Substances are moving through channels in the cell membrane

• Substances are moving from high to low concentrations.

• ATP is being rapidly consumed near the cellular membrane

• Substances are moving rapidly across the cell membrane.

A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which has occurred?

• The water in the gums has moved from a high to a low concentration of water.

• The salt in the solution has moved against the concentration gradient.

• The swollen gums have absorbed the saltwater solution.

• The saltwater solution lowers the temperature of the water in the gums.

Which is NOT an example of diffusion?

• potassium ions moving in and out of an animal cell

• water moving into the root cells of a plant

• carbon dioxide moving into the leaf cells of a plant

• oxygen moving into the bloodstream from the lungs

Why is osmosis a type of passive transport?

• It moves materials across a cell membrane

• It continues until equilibrium is reached.

• It does not need activation by an enzyme.

• It does not require any of the cell’s energy

Which is an example of osmosis?

• potassium ions moving in and out of an animal cell

• oxygen moving into the bloodstream from the

• water moving into the root cells of a plant

• carbon dioxide moving into the leaf cells of a plant

According to the diagram, which statement best describes the general direction of diffusion across the membrane of this cell?

• Oxygen would diffuse into the cell.

• Carbon Dioxide would diffuse out of the cell.

• Protein would diffuse out of the cell.

• Glucose would diffuse into the cell.

According to the diagram to the above, which direction would glucose move?

• Glucose would diffuse into the cell via diffusion.

• Glucose would diffuse out of the cell via osmosis

• Glucose would move into the cell via osmosis.

• Glucose would diffuse out of the cell via diffusion

You are conducting osmosis experiments with a test tube of human cells in solution. You add a teaspoon of table salt to the test tube. According to the principles of osmosis, what can you predict will happen to the cells?

• They will not be affected.

• They will undergo rapid mitosis.

• They will swell and burst.

• They will shrink and shrivel.