Cell Transport (Strand 2.4)

In which direction does diffusion happen?

• from high concentrations to low concentrations

• from low concentrations to high concentrations

In which direction does active transport happen?

• from high concentrations to low concentrations

• from low concentrations to high concentrations

What role does the cell membrane play in cell transport?

• The cell membrane determines what can enter and leave the cell.

• The cell membrane provides the energy necessary for osmosis.

• The cell membrane forms vesicles for transport with diffusion.

• The cell membrane isn't involved in cell transport - the nucleus is.

Bulk transport always requires energy.

• TRUE

• FALSE

Tags

NGSS.MS-PS3-5

Which of the following is true about the cell membrane in regards to cell transport? Select all that apply.

• The cell membrane forms a semipermeable barrier that causes osmosis to happen.

• Some things can easily pass through the cell membrane.

• The cell membrane forms vesicles that aid in bulk transport.

• Channels and pumps are used to transport substances through the cell membrane actively.

Which of the following best describes what is happening at step 3 in the diagram shown above?

• The secretory vesicle is merging with the cell membrane and releasing the substances into the extracellular space.

• The secretory vesicle is being absorbed by the cell membrane into the cell.

• The proteins are traveling through a channel in order to enter the cell actively.

• The cell membrane is breaking a part in order to form a vesicle.

Assume that a plant cell has a water concentration of 75%. If a plant cell were placed in a beaker filled with a salt water solution, in which of the following solutions would water LEAVE the cell via osmosis?

• Salt concentration of 50%

• Salt concentration of 20%

• Salt concentration of 10%

• Salt concentration of 5%

Which of the following is an example of passive transport?

• endocytosis

• exocytosis

• diffusion

Bulk transport could be used for all of the following EXCEPT...

• large quantities of substances that need to be brought into the cell

• large quantities of substances that need to be released from the cell.

• small molecules that can easily diffuse across the cell membrane.

• large molecules that cannot easily diffuse across the cell membrane.

This table shows the passive transport of carbon dioxide into a cell. Based on the data presented in the table, what is the concentration of carbon dioxide inside and outside of the cell when the cell reaches equilibrium?

Tags

NGSS.HS-LS2-5