Chapter 7.3/7.4 Review

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy by the cell. It occurs along the concentration gradient, from an area of higher concentration to an area of lower concentration.

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane against the concentration gradient, requiring energy (usually in the form of ATP).

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in large molecules or particles by engulfing them in a membrane-bound vesicle.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel large molecules or particles by vesicles fusing with the cell membrane and releasing their contents outside the cell.

Front

What are fatty acids?

Back

Fatty acids are long hydrocarbon chains that are key components of lipids, such as triglycerides and phospholipids, and are important for energy storage and cell membrane structure.

Front

What is glycerol?

Back

Glycerol is a three-carbon molecule that forms the backbone of triglycerides and phospholipids, serving as a structural component in lipids.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses specific transport proteins to help move substances across the cell membrane without energy.

Front

What is a channel protein?

Back

Channel proteins are integral membrane proteins that form pores in the cell membrane, allowing specific ions or molecules to pass through.

Front

What is a carbohydrate chain?

Back

Carbohydrate chains are long chains of sugar molecules that are often attached to proteins or lipids on the cell surface, playing a role in cell recognition and signaling.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of substances during diffusion.