Passive Transport: Simple, Facilitated, and Osmosis

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, relying on concentration gradients.

Front

What are the three types of passive transport?

Back

The three types of passive transport are simple diffusion, facilitated diffusion, and osmosis.

Front

Define simple diffusion.

Back

Simple diffusion is the process by which small or nonpolar molecules move directly through the phospholipid bilayer from an area of high concentration to an area of low concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which larger or polar molecules pass through the cell membrane with the help of membrane proteins.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What role do membrane proteins play in passive transport?

Back

Membrane proteins assist in the transport of molecules across the cell membrane and help the cell communicate with the outside environment.

Front

What is homeostasis?

Back

Homeostasis is the process by which a cell or organism maintains stable internal conditions despite changes in the external environment.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to move out of the cell.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to move into the cell.

Front

What is an isotonic solution?

Back

An isotonic solution has an equal concentration of solutes compared to the inside of the cell, resulting in no net movement of water.