Simple and Facilitated Diffusion

The cell membrane regulates what enters and leaves the cell, maintaining homeostasis.

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration.

Facilitated diffusion is a process that allows substances to cross membranes with the assistance of special proteins.

Glucose is an example of a substance that uses facilitated diffusion to enter cells.

A high concentration area refers to a region where molecules are tightly packed together.

Transport proteins help specific molecules cross the cell membrane without using energy.

Simple diffusion does not require assistance from proteins, while facilitated diffusion does.

Higher temperatures increase the kinetic energy of molecules, leading to a faster rate of diffusion.

Osmosis is the diffusion of water across a selectively permeable membrane.

In a hypertonic solution, water leaves the cell, causing it to shrink.