Homeostasis and Cell Transport Unit 6, Lesson 5

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, requiring 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

Define Diffusion.

Back

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

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 Exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the cell membrane.

Front

What is Endocytosis?

Back

Endocytosis is the process by which a cell takes in materials by engulfing them in a vesicle.

Front

What is a Concentration Gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space.

Front

Why does Active Transport require energy?

Back

Active Transport requires energy because it moves molecules against their concentration gradient, from low concentration to high concentration.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, a cell loses water and shrinks, which can cause it to shrivel and die.