Cell Transport

Front

What is osmosis?

Back

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

Front

What is diffusion?

Back

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

Front

What is the difference between osmosis and diffusion?

Back

Osmosis specifically refers to the movement of water, while diffusion refers to the movement of any type of particles.

Front

What does it mean for a solution to be isotonic?

Back

An isotonic solution has the same concentration of solutes as another solution, resulting in no net movement of water across the membrane.

Front

What is active transport?

Back

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

Front

Why is osmosis important for cells?

Back

Osmosis is crucial for maintaining cell turgor pressure, which helps keep cells rigid and supports plant structure.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, crucial for maintaining homeostasis in cells.

Front

What happens during endocytosis?

Back

Endocytosis is the process by which cells engulf substances from their external environment, bringing them into the cell.

Front

What is the role of transport proteins in cell membranes?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either passively or actively.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, driving diffusion and osmosis.