Membrane Transport

Front

What is membrane transport?

Back

The process by which substances move across the cell membrane, including mechanisms like diffusion, osmosis, and active transport.

Front

What is pinocytosis?

Back

A type of endocytosis where a cell takes in liquids by engulfing them in vesicles.

Front

What are integral proteins?

Back

Proteins that span the entire membrane and are involved in transporting materials in and out of the cell.

Front

What is facilitated diffusion?

Back

The movement of particles across a membrane through channel proteins, following the concentration gradient without energy expenditure.

Front

What is the sodium-potassium pump?

Back

A specialized integral protein that actively transports sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

Front

What are marker proteins?

Back

Proteins that serve as identification tags for cells, helping the immune system recognize self from non-self.

Front

What is active transport?

Back

The movement of substances against their concentration gradient, requiring energy, often in the form of ATP.

Front

What is osmosis?

Back

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

Front

What are peripheral proteins?

Back

Proteins that are attached to the exterior or interior surfaces of the membrane but do not span the membrane.

Front

What is diffusion?

Back

The passive movement of particles from an area of higher concentration to an area of lower concentration.