24 Diffusion, Osmosis, and Cell Transport

Front

What is Passive Transport?

Back

Passive Transport is the movement of solutes across a cell membrane without the use of energy, following the concentration gradient.

Front

What happens to a cell in a hypotonic solution?

Back

A cell in a hypotonic solution will swell as water enters the cell.

Front

What is Active Transport?

Back

Active Transport is the movement of solutes against the concentration gradient, requiring energy (ATP) to transport substances across the cell membrane.

Front

What happens to a cell in a hypertonic solution?

Back

A cell in a hypertonic solution will shrink as water leaves the cell.

Front

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

Back

Selectively permeable means that the cell membrane allows certain substances to enter or leave the cell while blocking others.

Front

What is Osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of particles.

Front

What is the role of ATP in Active Transport?

Back

ATP provides the energy required for Active Transport to move substances against their concentration gradient.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to leave the cell.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to enter the cell.