Cell Transport

Front

What is the primary compound that makes up about 80% of a cell?

Back

Water

Front

What is osmosis?

Back

The movement of water across a membrane.

Front

What is the process called when materials move across a membrane using cellular energy?

Back

Active Transport

Front

Does passive transport require energy?

Back

No, passive transport does not use energy.

Front

What are the molecules that primarily make up the cell membrane?

Back

Lipids.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space.

Front

What role do proteins play in cell transport?

Back

Proteins can act as channels or carriers to facilitate the movement of substances across the cell membrane.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses proteins to help move substances across the membrane without energy.

Front

What is the significance of the fluid mosaic model?

Back

The fluid mosaic model describes the structure of the cell membrane as a mosaic of various proteins that float in or on the fluid lipid bilayer.