Cell Membrane and Cell Transport Flashcard

Front

What is diffusion?

Back

The movement of molecules from an area of high concentration to an area of low concentration.

Front

What is passive transport?

Back

Transport of substances across a cell membrane without the use of energy.

Front

What is active transport?

Back

The movement of molecules across a cell membrane from an area of low concentration to an area of high concentration, requiring energy.

Front

What is osmosis?

Back

The movement of water across a semipermeable membrane.

Front

What is a hypotonic solution?

Back

A solution with a lower concentration of solutes compared to the inside of the cell, causing the cell to swell.

Front

What is a hypertonic solution?

Back

A solution with a higher concentration of solutes compared to the inside of the cell, causing the cell to shrink.

Front

What is a semipermeable membrane?

Back

A membrane that allows certain molecules to pass through while blocking others.

Front

What is the function of proteins in the cell membrane?

Back

Help transport certain materials across the cell membrane and are involved in cell-to-cell recognition.

Front

What is the cell membrane made of?

Back

A bilayer of phospholipids with embedded proteins.

Front

What is facilitated diffusion?

Back

The process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.