Session Three (1.3.3): Active Transport

Introduction

Active transport is a process that requires energy and involves moving biological substances against a concentration gradient. It helps with understanding to think of a concentration gradient as rather like a slope or a hill. If you look back at the diagram on page 18, it shows biological substances moving down the slope, or rather down the concentration gradient. Active transport causes biological molecules to move up the slope or against the concentration gradient.

Reading

Read and make notes on pages 25-26.

Tasks

Add the definition of active transport to your key word glossary and or Quizlett App.

Make a copy of the labelled diagram of how active transport is thought to work (Fig. B2.12).

Link

WATCH - Transport In Cells: Active Transport (YouTube) Links to an external site.

WATCH - Active Transport Explained (YouTube) Links to an external site.