Cellular Transport

Front

What is cellular transport?

Back

Cellular 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 active transport.

Back

Active transport is the process of moving substances against their concentration gradient, requiring energy (usually in the form of ATP).

Front

Define passive transport.

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, occurring along the concentration gradient.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane from an area of high water concentration to an area of low water 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 facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move large or polar molecules across the cell membrane without energy.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others, crucial for maintaining homeostasis in cells.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in concentration of a substance across a space, driving the movement of particles during diffusion.

Front

What role do channel proteins play in cellular transport?

Back

Channel proteins facilitate the transport of specific substances across the cell membrane, especially those that cannot easily pass through the lipid bilayer.

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.