Cell Membrane and Transport

Front

Facilitated diffusion is used for which type of molecules?

Back

Large molecules like glucose.

Front

Which type of molecules require transport proteins to pass through a membrane?

Back

Large, uncharged polar molecules.

Front

What is the primary function of phospholipids in the cell membrane?

Back

To form a barrier to water-soluble substances.

Front

What is the primary function of carbohydrates on the cell surface?

Back

Cell communication.

Front

What is the role of carbohydrates in the cell membrane?

Back

Cell communication.

Front

What is the structure of a phospholipid?

Back

A phospholipid consists of a hydrophilic (water-attracting) 'head' and two hydrophobic (water-repelling) 'tails'.

Front

What is the fluid mosaic model?

Back

The fluid mosaic model describes the cell membrane as a flexible layer made of lipid molecules with proteins embedded in it, allowing for movement and interaction.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What are integral proteins?

Back

Integral proteins are proteins that are permanently attached to the biological membrane and can span across the membrane.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.