Save for later

Cellular respiration

This course is a part of AP®︎ Biology, a 38-course Topic series from Khan Academy.

How do your cells extract energy from the food that you eat? As it turns out, cells have a network of elegant metabolic pathways dedicated to just this task. Learn more about cellular respiration, fermentation, and other processes that extract energy from fuel molecules like glucose.

This course contains 6 segments:

Introduction to cellular respiration

How does your body get usable energy from the snack you just ate? Learn the basics of how cells extract energy from fuel molecules, including what redox reactions are and why they are important in the breakdown of fuels.

Steps of cellular respiration

Before you jump into the nitty-gritty details, get the big picture of cellular respiration. Learn about the different stages of this process and how they fit together.

Glycolysis

The name glycolysis means "sugar-splitting," and sure enough, this metabolic pathway splits glucose into two three-carbon molecules. Learn more about the steps of glycolysis and how it is used in both cellular respiration and fermentation.

Pyruvate oxidation and the citric acid cycle

Glycolysis can extract a bit of the energy from a glucose molecule, but the citric acid cycle can squeeze out much more. Learn about the steps of the cycle, how it harvests energy, and how it's fueled by acetyl CoA (produced by oxidation of pyruvate from glycolysis).

Oxidative phosphorylation

Oxidative phosphorylation produces most of the ATP made in cellular respiration. Learn more about how oxidative phosphorylation uses electron transport to drive ATP synthesis.

Variations on cellular respiration

There's more than one way to extract energy from a fuel molecule! Learn how cells break down fuels without oxygen, how non-glucose molecules can enter cellular respiration, and how cellular respiration is regulated.

Set Reminder Save for later

Get a Reminder

Not ready to enroll yet? We'll send you an email reminder for this course

Send to:

Khan Academy

Rating Not enough ratings
Length 6 segments
Starts On Demand (Start anytime)
Cost Free
From Khan Academy
Download Videos On all desktop and mobile devices
Language English
Subjects Science
Tags Science

Get a Reminder

Get an email reminder about this course

Send to:

Careers

An overview of related careers and their average salaries in the US. Bars indicate income percentile.

Cellular Phone Technician $57k

Cellular Biologist $65k

Division Chair, Cellular and Molecular Pathogenesis $70k

Cellular Neuroscientist (BS or MS) $71k

Cellular Sales Rep Manager $76k

Senior Cellular Installation and Testing $78k

Molecular and Cellular Biology Program Manager $90k

Cellular Networks Support Engineer $93k

Cellular Field Engineer Manager $103k

Molecular Scientist - Target Biology and Cellular Profiling $106k

Cellular Test Software Engineer $118k

Associate Adjunct Professor Biochemistry and Molecular & Cellular Biology $119k

Write a review

Your opinion matters. Tell us what you think.

Khan Academy

Rating Not enough ratings
Length 6 segments
Starts On Demand (Start anytime)
Cost Free
From Khan Academy
Download Videos On all desktop and mobile devices
Language English
Subjects Science
Tags Science

Similar Courses

Sorted by relevance

Like this course?

Here's what to do next:

  • Save this course for later
  • Get more details from the course provider
  • Enroll in this course
Enroll Now