Chapter 8 Cells and Cell processes

Front

What is active transport?

Back

Active transport is the process by which molecules move against the concentration gradient, requiring energy.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, following the concentration gradient.

Front

Name a type of passive transport.

Back

Diffusion, osmosis, and facilitated diffusion are types of passive transport.

Front

What is endocytosis?

Back

Endocytosis is a process by which cells engulf substances from the outside environment, which is not a type of passive transport.

Front

What is the function of mitochondria?

Back

Mitochondria are known as the 'powerhouse' of the cell because they produce energy in the form of ATP.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process where molecules move across the cell membrane from high to low concentration through a helper protein.

Front

What happens in an isotonic solution?

Back

In an isotonic solution, water moves in and out of the cell at an equal rate, maintaining cell size.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane.

Front

What is the role of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, maintaining homeostasis.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.