Cell Transport

Front

What is Active Transport?

Back

Active Transport is the movement of particles across a cell membrane from a region of lower concentration to a region of higher concentration, using energy (ATP).

Front

What is Passive Transport?

Back

Passive Transport is the movement of particles across a cell membrane from a region of higher concentration to a region of lower concentration, without the use of energy.

Front

What role does the cell membrane play in homeostasis?

Back

The cell membrane regulates what enters and exits the cell, maintaining a stable internal environment (homeostasis).

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, a cell will lose water and shrink because the concentration of solute outside the cell is higher than inside.

Front

What is endocytosis?

Back

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

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials by vesicles fusing with the cell membrane.

Front

What is osmosis?

Back

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

Front

Define concentration gradient.

Back

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

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others.

Front

What is the difference between diffusion and facilitated diffusion?

Back

Diffusion is the movement of molecules from high to low concentration without assistance, while facilitated diffusion requires specific transport proteins.