Cellular Transport Flashcard

Front

What is osmosis?

Back

Osmosis is the movement 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 diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration until they are evenly distributed.

Tags

NGSS.HS-LS2-3

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels in the cell membrane to help larger or polar molecules, like glucose, cross the membrane.

Front

What is active transport?

Back

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

Front

What is passive transport?

Back

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

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.

Tags

NGSS.HS-LS1-3

Front

What role do proteins play in cellular transport?

Back

Proteins in the cell membrane can act as channels or carriers to facilitate the movement of substances in and out of the cell.

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.

Front

What is an example of active transport?

Back

An example of active transport is the sodium-potassium pump, which moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

Front

What is endocytosis?

Back

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

Tags

NGSS.HS-LS2-3