Cell Transport

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is required for active transport?

Back

Active transport requires energy (ATP) to move materials from an area of low concentration to an area of high concentration.

Front

Define isotonic environment.

Back

An isotonic environment is one where the concentrations of solute and water are equal inside and outside the cell, resulting in no net movement of water.

Front

What happens in a hypertonic environment?

Back

In a hypertonic environment, the concentration of solute is higher outside the cell than inside, causing water to move out of the cell, leading to cell shrinkage.

Front

What is a hypotonic environment?

Back

A hypotonic environment has a lower concentration of solute outside the cell than inside, causing water to move into the cell, which may lead to cell bursting.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is the role of a semi-permeable membrane in cell transport?

Back

A semi-permeable membrane allows certain molecules to pass through while blocking others, facilitating selective transport.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

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 endocytosis?

Back

Endocytosis is the process by which cells engulf substances from their external environment, forming a vesicle to bring them into the cell.