Active 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 in the form of ATP.

Tags

NGSS.HS-LS2-3

Front

What is the main 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 is endocytosis?

Back

Endocytosis is a type of active transport where cells engulf substances from the outside environment, bringing them into the cell.

Front

What is exocytosis?

Back

Exocytosis is a type of active transport where cells expel substances to the outside environment, releasing them from the cell.

Front

What is the sodium-potassium pump?

Back

The sodium-potassium pump is a type of active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell, crucial for maintaining cellular function.

Tags

NGSS.HS-LS1-3

Front

What is facilitated diffusion?

Back

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

Front

What is osmosis?

Back

Osmosis is the passive transport of water molecules across a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration.

Front

What role does ATP play in active transport?

Back

ATP provides the energy required for active transport processes, allowing cells to move substances against their concentration gradients.

Front

Give an example of active transport in the human body.

Back

An example of active transport in the human body is the absorption of glucose in the intestines, where glucose is transported into cells against its concentration gradient.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of substances during transport.