Cell Transport Review

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 in the form of ATP.

Front

What is passive transport?

Back

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

Front

What is osmosis?

Back

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

Front

What does isotonic mean?

Back

Isotonic refers to a solution that has the same solute concentration as another solution, resulting in no net movement of water across the membrane.

Front

What does hypotonic mean?

Back

Hypotonic refers to a solution that has a lower solute concentration compared to another solution, causing water to move into the cell.

Front

What does hypertonic mean?

Back

Hypertonic refers to a solution that has a higher solute concentration compared to another solution, causing water to move out of the cell.

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

Why does active transport require energy?

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move molecules across the cell membrane.

Front

What is the role of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, providing protection and maintaining homeostasis.