Cell Membrane and Cell Transport Flashcard

Front

What is the structure of the cell membrane primarily made of?

Back

The cell membrane is primarily made of phospholipids, which form a bilayer.

Front

What is the function of proteins in the cell membrane?

Back

Proteins in the cell membrane assist in transport, act as receptors, and provide structural support.

Front

Define passive transport.

Back

Passive transport is the movement of substances across a cell membrane without the use of energy.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy.

Front

What is the role of ATP in cellular processes?

Back

ATP (adenosine triphosphate) provides energy for active transport and other cellular functions.

Front

Explain facilitated diffusion.

Back

Facilitated diffusion is a type of passive transport that uses proteins to help move molecules across the membrane.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from their 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

Define concentration gradient.

Back

A concentration gradient is the difference in the concentration of a substance across a space.

Front

What is the significance of a concentration gradient in passive transport?

Back

In passive transport, molecules move from an area of higher concentration to an area of lower concentration.