Mills - HIS Cell Transport

Front

What is diffusion?

Back

Diffusion is the process in which molecules move from an area of high concentration to an area of low concentration across a selectively permeable membrane.

Front

What is osmosis?

Back

Osmosis is a specific type of diffusion that refers to the movement of water molecules across a selectively permeable membrane.

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 facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via the aid of a membrane protein.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance from one location to another.

Front

What are phospholipids?

Back

Phospholipids are molecules that make up the cell membrane, consisting of a hydrophilic (water-attracting) 'head' and two hydrophobic (water-repelling) 'tails' made of fatty acids.

Front

What is endocytosis?

Back

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

Front

What is exocytosis?

Back

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

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others.

Front

What role do fatty acids play in the cell membrane?

Back

Fatty acids form the hydrophobic tails of phospholipids, contributing to the structure and function of the cell membrane.