Cell Membrane

Front

What is diffusion?

Back

Diffusion is the process when molecules move from a high concentration to a low concentration.

Front

What are the two parts of a phospholipid called?

Back

The two parts of a phospholipid are called the Hydrophilic Head and the Hydrophobic Tail.

Front

What part of the phospholipids in a cell membrane faces inward towards each other?

Back

The tails of the phospholipids face inward because they are hydrophobic.

Front

What part of the phospholipids in a cell membrane faces outward?

Back

The heads of the phospholipids face outward because they are hydrophilic.

Front

What type of Passive Transport is represented by molecules moving through a protein channel?

Back

This is known as Facilitated Diffusion.

Front

What is the primary function of the cell membrane?

Back

The primary function of the cell membrane is to protect the cell and regulate what enters and exits.

Front

What does selectively permeable mean in relation to the cell membrane?

Back

Selectively permeable means that the cell membrane allows certain substances to pass while blocking others.

Front

What is osmosis?

Back

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

Front

What is the role of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the cell membrane's fluidity.

Front

What are membrane proteins and their functions?

Back

Membrane proteins assist in transport, act as enzymes, and serve as receptors for signaling.