BrainPop: Passive Transport

Where do cells get the oxygen, water, and nutrients they need to function?

• From the heart

• From the stomach

• From the bloodstream

• From the lungs

Tags

NGSS.MS-LS2-1

Cell membranes are selectively permeable. What does "permeable" mean?

• Extremely thick

• Extremely thin

• Unable to be penetrated

• Able to be penetrated

What might happen if cell membranes did not have pores?

• The cells would not be able to divide

• The cell membrane would become a cell wall, instead

• Substances would not be able to move in and out

• Viruses and bacteria would be able to get in more easily

Tags

NGSS.MS-LS1-2

Which of the following is an example of diffusion?

• A stone sinking to the bottom of a lake

• Sugar dissolving in a glass of water

• Water freezing into ice

• Rain falling from the sky

Which of the following describes a state of equilibrium?

• When the concentration of water outside a cell is the same as inside a cell

• When water molecules have stopped moving or vibrating

• When the roots of a tree absorbs nutrients from the soil

• When a cell with a lot of water in it continues to absorb water

In what direction do particles naturally diffuse?

• Across concentration gradients

• Through concentration gradients

• Down concentration gradients

• Up concentration gradients

From the information presented in the movie, what can you infer about carbon dioxide?

• Its molecules are too large to fit through the pores of cells

• Your cells need a lot of it to function

• It can only be moved into and out of cells through active transport

• It is a waste gas that your cells need to get rid of

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

When substances are constantly moving back and forth across a cell membrane, the cell is said to be in a state of:

• Dynamic diffusion

• Dynamic transport

• Dynamic absorption

• Dynamic equilibrium

Tags

NGSS.MS-LS1-2

What is the main difference between active transport and passive transport?

• Active transport involves molecules of gases; passive transport involves molecules of liquids

• Active transport takes place in plant cells; passive transport takes place in animal cells

• Active transport takes place in the bloodstream; passive transport takes place in cells

• Active transport requires a cell to use energy; passive transport does not

Which of the following is a true statement about passive transport?

• Cells do not need water or oxygen in order to function.

• Diffusion plays only a minor role in passive transport.

• Substances naturally move from areas of high concentration to areas of low concentration.

• Molecules of glucose can be imported into a cell without energy being expended.