Active Transport

Front

What is active transport?

Back

Active transport is the process by which cells use energy to move substances across the cell membrane against their concentration gradient.

Front

What are the three types of active transport?

Back

1. Sodium/potassium pump 2. Endocytosis 3. Exocytosis

Front

What is required for active transport to occur?

Back

Energy is required to move materials across the cell membrane during active transport.

Front

What is the sodium/potassium pump?

Back

The sodium/potassium pump is a type of active transport that moves sodium ions out of the cell and potassium ions into the cell, using energy.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from the outside environment, bringing them into the cell.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials to the outside environment, often using vesicles.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What does isotonic mean in relation to cell transport?

Back

Isotonic refers to a solution where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane without using energy.

Front

What is osmosis?

Back

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