T2L3 Obtaining and Removing Materials

Front

What is endocytosis?

Back

Endocytosis is the process by which a cell engulfs material from its environment, bringing it into the cell by wrapping its cell membrane around it.

Front

What does 'region with high concentration' mean?

Back

A region with high concentration means there is a LARGE number of particles in that area.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials from its interior to the outside environment by vesicles fusing with the cell membrane.

Front

What is the cell wall?

Back

The cell wall is the rigid supporting layer that surrounds the cells of plants, providing protection and support.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a 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 substances across a cell membrane against their concentration gradient, requiring energy.

Front

What is osmosis?

Back

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

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 a single-celled organism?

Back

A single-celled organism is a living entity that consists of only one cell, such as an amoeba or bacteria.

Front

What role do vacuoles play in cells?

Back

Vacuoles are storage organelles in cells that hold various substances, such as nutrients, waste products, or water.