SC.912.L.14.2 Cell Transport

Front

What is the primary function of ATP in cell transport?

Back

ATP is used to provide energy for active transport processes, allowing substances to move against their concentration gradient.

Front

What happens to water in swollen gums when rinsed with salt water?

Back

The water in the gums moves out due to the high concentration of salt in the solution, causing the swelling to decrease.

Front

What type of transport allows substance A to enter the cell without energy?

Back

Substance A enters the cell through passive transport.

Front

How do molecules typically move across the cell membrane when following the concentration gradient?

Back

Molecules move into the cell via passive transport by diffusion.

Front

What is the definition of active transport?

Back

Active transport is the movement of ions or molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically following the concentration gradient.

Front

What role do ion pumps play in cell transport?

Back

Ion pumps actively transport ions across the cell membrane, often against their concentration gradient, using energy from ATP.

Front

What is osmosis?

Back

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

Front

What is the difference between diffusion and facilitated diffusion?

Back

Diffusion is the movement of molecules from high to low concentration directly through the membrane, while facilitated diffusion involves specific transport proteins to help move substances across the membrane.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules during diffusion.