Unit 8 PAMO Review Homeostasis

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, using energy.

Front

What is passive transport?

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move molecules, such as glucose, across the cell membrane.

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 hypertonic solution?

Back

A hypertonic solution is one that has a higher concentration of solutes compared to another solution, leading to the movement of water out of a cell.

Front

What is a hypotonic solution?

Back

A hypotonic solution is one that has a lower concentration of solutes compared to another solution, causing water to move into a cell.

Front

What is isotonic solution?

Back

An isotonic solution has an equal concentration of solutes compared to another solution, resulting in no net movement of water.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules.

Front

What role do protein channels play in facilitated diffusion?

Back

Protein channels provide a pathway for specific molecules to pass through the cell membrane during facilitated diffusion.