Cell Membranes

Front

What is the hydrophilic portion of the cell membrane?

Back

The hydrophilic portion of the cell membrane refers to the phosphate heads of phospholipids that are attracted to water.

Front

What type of receptor is located inside the cell?

Back

Intracellular receptor.

Front

How many layers make up the lipid bilayer of a cell membrane?

Back

The lipid bilayer is 2 layers thick.

Front

What does it mean when a membrane is described as selectively permeable?

Back

It means that some molecules can cross the membrane while others cannot.

Front

What term describes molecules that do not interact well with water?

Back

Hydrophobic.

Front

What are the main components of a cell membrane?

Back

Phospholipids, proteins, cholesterol, and carbohydrates.

Front

What is the function of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the membrane's fluidity.

Front

What is the role of proteins in the cell membrane?

Back

Proteins serve as channels, receptors, and enzymes, facilitating communication and transport.

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 osmosis?

Back

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