Active and Passive Transport Review

Front

What is active transport?

Back

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 passive transport?

Back

The movement of molecules across a cell membrane without the use of energy, typically from an area of high concentration to an area of low concentration.

Front

Define diffusion.

Back

The process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What is osmosis?

Back

The diffusion of water molecules through a selectively permeable membrane.

Front

What is phagocytosis?

Back

A type of active transport where a cell engulfs solid particles, often referred to as 'cell eating'.

Front

What is exocytosis?

Back

The process by which a cell expels materials in vesicles, often used to release hormones or neurotransmitters.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will lose water and shrink.

Front

What happens to a cell in a hypotonic solution?

Back

The cell will gain water and swell.

Front

What is the role of the cell membrane?

Back

To regulate what enters and exits the cell, maintaining homeostasis.

Front

What types of molecules can pass through the cell membrane easily?

Back

Small nonpolar molecules like oxygen and carbon dioxide.