Cell Transport

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as diffusion, osmosis, and active transport.

Front

Define passive transport.

Back

Passive transport is the movement of molecules across the cell membrane without the use of energy, typically moving from an area of high concentration to an area of low concentration.

Front

What is active transport?

Back

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

Front

Explain diffusion.

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is osmosis?

Back

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

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules during diffusion and osmosis.

Front

What role do proteins play in cell transport?

Back

Proteins can act as channels or carriers in the cell membrane, facilitating the transport of substances across the membrane, especially in active and facilitated transport.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses membrane proteins to help move molecules across the cell membrane without energy.

Front

Why is passive transport important for cells?

Back

Passive transport allows cells to take in essential materials and expel waste products without expending energy, maintaining homeostasis.

Front

What is the difference between osmosis and diffusion?

Back

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