4.2 Passive Transport

Front

What is passive transport?

Back

A process of cellular transport that does not require energy to move substances across cell membranes.

Front

What is the difference between hypertonic, hypotonic, and isotonic solutions?

Back

Hypertonic solutions have a higher concentration of solutes than the cell, hypotonic solutions have a lower concentration, and isotonic solutions have equal concentrations.

Front

In what type of environment would you find hypertonic cells?

Back

Salty water.

Front

What type of transport requires cellular energy?

Back

Active transport.

Front

What is diffusion?

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What is facilitated diffusion?

Back

A type of passive transport that uses protein channels to help move substances across the membrane.

Front

What does selectively permeable mean?

Back

A property of cell membranes that allows some substances to pass through while blocking others.

Front

What is an example of a substance that moves via passive transport?

Back

Oxygen and carbon dioxide can move across cell membranes by diffusion.

Front

What is the end result of diffusion over time?

Back

An isotonic solution, where concentrations are equal on both sides of the membrane.