Cell Membrane & Transport

Front

What is diffusion?

Back

Diffusion is the free movement of particles across the membrane with the concentration gradient.

Front

What is active transport?

Back

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

Front

What is the primary component of the cell membrane?

Back

Most of the cell membrane is made of lipids.

Front

What is the function of the plasma membrane?

Back

The function of the plasma membrane is to regulate what enters and leaves the cell.

Front

Does passive transport require energy?

Back

No, passive transport uses no energy.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across a membrane via protein channels without energy, following the concentration gradient.

Front

What role do proteins play in the cell membrane?

Back

Proteins in the cell membrane help with transport, communication, and structural support.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from their external environment.

Front

What is exocytosis?

Back

Exocytosis is the process of vesicles fusing with the plasma membrane to release their contents outside the cell.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.