Cell Transport

Front

What is the phospholipid bilayer?

Back

The phospholipid bilayer is a double layer of phospholipids that makes up the cell membrane, providing a barrier that separates the inside of the cell from the outside environment.

Front

What is active transport?

Back

Active transport is the movement of molecules from an area of low concentration to an area of high concentration, requiring energy (ATP) to do so.

Front

How many layers does the cell membrane have?

Back

The cell membrane has two layers.

Front

What is the hydrophilic phosphate head?

Back

The hydrophilic phosphate head is the part of the phospholipid that is attracted to water, facing outward towards the aqueous environment.

Front

What is the hydrophobic lipid tail?

Back

The hydrophobic lipid tail is the part of the phospholipid that repels water, facing inward away from the aqueous environment.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is a channel protein?

Back

A channel protein is a type of membrane protein that allows specific molecules or ions to pass through the cell membrane.

Front

What is a marker protein?

Back

A marker protein is a protein that helps identify the cell type and is involved in cell recognition.

Front

What is the role of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the cell membrane's fluidity and structure.