Active and Passive Transport

Front

What does it mean for a cell membrane to be selectively permeable?

Back

Cell membranes regulate which substances can enter and exit the cell.

Front

What is diffusion?

Back

The movement of particles from high concentration to low concentration in a given space.

Front

What is osmosis?

Back

The movement of water through a semi-permeable membrane.

Front

What is the difference between active and passive transport?

Back

Active transport uses ATP (energy) while passive transport does not need energy.

Front

What is homeostasis in the context of cells?

Back

A state where both inside and outside of a cell have the same amount of water.

Front

What is the role of transport proteins in active transport?

Back

Transport proteins help move substances across the cell membrane using energy.

Front

Can passive transport occur without energy?

Back

Yes, passive transport occurs without the use of energy.

Front

What is an example of a substance that moves via osmosis?

Back

Water.

Front

What is the primary energy source for active transport?

Back

ATP (adenosine triphosphate).

Front

What happens to a cell in a hypertonic solution?

Back

The cell loses water and may shrink.