Cell Transport Vocab

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane against their concentration gradient, requiring energy.

Tags

NGSS.HS-LS1-2

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, moving down their concentration gradient.

Front

What does 'energy is required' mean in the context of cell transport?

Back

It means that the process needs ATP or another form of energy to move substances against their concentration gradient.

Front

What does 'energy is not required' mean in the context of cell transport?

Back

It means that the process occurs naturally without the need for additional energy, moving substances from high to low concentration.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance between two areas.

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-5

Front

What is meant by 'high concentration area'?

Back

A high concentration area refers to a region where a substance is tightly packed together.

Tags

NGSS.HS-PS1-5

Front

What is meant by 'low concentration area'?

Back

A low concentration area refers to a region where a substance is spread out or less densely packed.

Tags

NGSS.HS-PS1-5

Front

What is an example of active transport?

Back

An example of active transport is the sodium-potassium pump, which moves sodium ions out of and potassium ions into the cell.

Front

What is an example of passive transport?

Back

An example of passive transport is diffusion, where molecules move from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

Osmosis is the passive transport of water molecules across a selectively permeable membrane.