Cell Membrane and Cell Transport Flashcard

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy. It occurs naturally due to concentration gradients.

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.

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane using energy, usually in the form of ATP, to move substances against their concentration gradient.

Front

What is the sodium-potassium pump?

Back

The sodium-potassium pump is an example of active transport that moves sodium ions out of the cell and potassium ions into the cell, using ATP for energy.

Front

What is endocytosis?

Back

Endocytosis is a process by which cells take in substances by engulfing them in a membrane, forming a vesicle.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel substances by vesicles fusing with the cell membrane and releasing their contents outside the cell.

Front

What is ATP?

Back

ATP (adenosine triphosphate) is the primary energy carrier in cells, used to power various cellular processes, including active transport.

Front

What is osmosis?

Back

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

Front

What is diffusion?

Back

Diffusion is the passive movement of particles from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What is the main function of the cell membrane?

Back

The main function of the cell membrane is to control the movement of substances in and out of the cell, maintaining homeostasis.