Review: Cellular Transport

Front

What prevents fatty acid tails from sticking together in the cell membrane?

Back

Cholesterol (Lipids) helps maintain fluidity in the cell membrane by preventing fatty acid tails from sticking together.

Front

What is the movement of particles across the plasma membrane from a low level to a high level using energy called?

Back

Active transport is the process that moves particles from an area of low concentration to an area of high concentration, requiring energy.

Front

What is the movement of a substance across the membrane without any energy from the cell?

Back

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

Front

What term describes the cell membrane's ability to choose what enters and leaves the cell?

Back

Selectively permeable means that the cell membrane can control which substances can pass through.

Front

Which process does NOT require ATP energy?

Back

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration without the use of energy.

Front

What is passive transport?

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move substances across the cell membrane.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in substances by engulfing them in a vesicle.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials in vesicles that fuse with the plasma membrane.

Front

What role do proteins play in the cell membrane?

Back

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