Unit 4: Cell Membrane and Transport

Front

What happens to a plant cell when there is a lower concentration of water outside than inside?

Back

The plant will lose water and wilt.

Front

What is diffusion?

Back

Diffusion is the movement of materials from an area of high concentration to an area of low concentration.

Front

What do transmembrane proteins do?

Back

Transmembrane proteins help the cell interact with its external environment.

Front

What is endocytosis?

Back

Endocytosis is a transport mechanism that can bring whole cells into a cell.

Front

What part of a bacterium allows it to recognize different substances in the environment?

Back

The cell membrane allows the bacterium to recognize different substances.

Front

Define osmosis.

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What is the role of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, maintaining homeostasis.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane proteins.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport requires energy to move substances.