Cell membrane

Front

What are the main components of the cell membrane?

Back

Phospholipids, proteins, cholesterol, and carbohydrates.

Front

What is the function of channel proteins in the cell membrane?

Back

Channel proteins facilitate the transport of specific substances across the cell membrane.

Front

What does the term 'hydrophobic' mean in relation to the cell membrane?

Back

Hydrophobic refers to the water-repelling properties of the fatty acid tails of phospholipids.

Front

What is the role of the plasma membrane in cells?

Back

The plasma membrane acts as a barrier that regulates what enters and exits the cell.

Front

Define diffusion in the context of cell membranes.

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses proteins to help move substances across the membrane.

Front

What is homeostasis?

Back

Homeostasis is the process by which cells maintain a stable internal environment despite changes in external conditions.

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 against their concentration gradient.

Front

What is the significance of the fluid mosaic model?

Back

The fluid mosaic model describes the structure of the cell membrane as a flexible layer of lipids with embedded proteins.

Front

What are glycoproteins and their function in the cell membrane?

Back

Glycoproteins are proteins with carbohydrate chains that play a role in cell recognition and signaling.