Cell transport made simple

Welcome dear student!

In this short course, you'll learn about cell transport: how things move in and out of a cell to facilitate the many chemical processes that take place in it.

You'll learn about active and passive transport, their mechanisms and utility, along with lots of examples. 

At the end of this course, you'll be able to:

  1. Define active and passive transport.
  2. Distinguish between the different types passive transport mechanisms: diffusion  and osmosis
  3. Explain what occurs in a  cell  in terms of active and passive transport

This is a very hands-on learning course. So gear up for some exciting sessions!


The basics of cell transport

The center of activity: the plasma membrane

Quick check: Why are diffusion and osmosis called "passive"?

Quick check: Properties of the cell membrane

Diffusion and why it is important to organisms


Quick check: What causes molecules to diffuse?

Quick check: The concentration gradient

–°ombine elements from the left column with the elements on the right
We say a concentration gradient is present
when one area has a higher number of molecules in a solution than another area.
A steep concentration gradient
slows down diffusion.
A low concentration gradient
facilitates diffusion.

Diffusion in organisms

Iso, Hypo, and Hyper

A special type of diffusion: osmosis

Osmosis and why it is important to organisms

Osmosis: A pre-test before you begin

Water potential and how it triggers osmosis

Test your intuition

Osmosis in plant and animal cells

Video: Putting it all together

Active transport and its role in cell transport

Active transport: a very brief overview

Active transport in plants and animals

Quick check: factors affecting rate of active transport