Simple Diffusion and Cell Membrane

Front

What is the main component of the cell membrane?

Back

Lipids are the main component of the cell membrane.

Front

What is the primary function of the cell membrane?

Back

The cell membrane regulates or controls what materials move in and out of the cell.

Front

What is diffusion in the context of cells?

Back

Diffusion is the process by which molecules move from a region of high concentration to a region of low concentration.

Front

What does the head of a phospholipid do in relation to water?

Back

The head of the phospholipid attracts water.

Front

Which cell part controls what enters and leaves the cell?

Back

The cell membrane controls what enters and leaves the cell.

Front

What are phospholipids?

Back

Phospholipids are molecules that make up the cell membrane, consisting of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

What is the role of proteins in the cell membrane?

Back

Proteins in the cell membrane help with transport, communication, and structural support.

Front

What is selective permeability?

Back

Selective permeability is the property of the cell membrane that allows certain substances to pass while blocking others.

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.

Front

What is osmosis?

Back

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