Cells need energy to power the chemical reactions that keep their microscopic cities running, and most of that energy comes from a chemical called ATP. In this episode of Crash Course Biology, we’ll learn how our cells use energy, what...

Paul Andersen describes three main characteristics of life that are conserved in all organisms on the planet. The universal genetic code, the central dogma of biology, and shared metabolic pathways give us details of the original...

The chemical reactions that occur in all living cells to extract, convert, and use the energy from food, to fuel all other cell processes. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning...

Brit looks back on our first month on Nature League, when we explored the theme of life on Earth.

Video lesson on the negative effects of ethanol on liver metabolism. Alcohol abuse can lead to toxic outcomes on the metabolism of the liver, including dysregulation of glycolysis, lactic acidosis, TCA cycle dysfunction, hypoglycemia,...

Basics of Amino Acid Structure (Part 2)

In this video, we explore the functions of growth hormone and how it is released.

How does your body break down the food you eat to generate the energy you need to get through your day? What form of energy is this, anyway? Let's go over some of the basics of metabolic processes, and introduce ATP, the currency of...