Cell Membrane and Transport

Front

What is osmosis?

Back

Osmosis is the movement of water molecules from an area of high concentration to an area of low concentration through a selectively permeable membrane.

Front

What type of transport allows small, non-polar molecules like CO2 and O2 to pass through the cell membrane?

Back

Diffusion allows small, non-polar molecules like CO2 and O2 to pass through the cell membrane.

Front

What are the channels and pumps in the phospholipid bilayer made of?

Back

The channels and pumps in the phospholipid bilayer are made of proteins.

Front

Does passive transport require energy?

Back

No, passive transport does not require energy.

Front

What is embedded in the phospholipid bilayer?

Back

Proteins are embedded in the phospholipid bilayer.

Front

Define diffusion.

Back

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

Front

What is the role of proteins in the cell membrane?

Back

Proteins in the cell membrane serve as channels, pumps, and receptors, facilitating transport and communication.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others.

Front

What is facilitated diffusion?

Back

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

Front

What is the difference between active and passive transport?

Back

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