The goal of this lesson is to introduce students who are interested in human biology and biochemistry to the subtleties of energy metabolism (typically not presented in standard biology and biochemistry textbooks) through the lens of ATP as the primary energy currency of the cell. Avoiding the details of the major pathways of energy production (such as glycolysis, the citric acid cycle, and oxidative phosphorylation), this lesson is focused exclusively on ATP, which is truly the fuel of life.

Cell Transport and HomeostasisGiving us credit when you use our content and technology is not just important for legal reasons. When you provide attribution to CK-12 Foundation, you support the ability of our non-profit organization to make great educational experiences available to students around the world.Our Creative Commons License welcomes you to use our content and technology when you give us attribution. If you have any questions about our policies, contact us at support@ck12.org

In this lesson, students read about different types of passive transport, how different types of active transport occur, and the role of cell transport in homeostasis.

In this lesson, students compare the mechanisms (i.e. active and passive transport) that transport materials across the plasma membrane.

This activity demonstrates diffusion, osmosis, and active transport through 12 interactive models. Students will begin by following the path of a molecule of dye in water, create concentration gradients on either side of a cell membrane and watch the movement of substances in and out of a cell, and monitor the movement of oxygen into red blood cells with and without hemoglobin.

Energy for LifeGiving us credit when you use our content and technology is not just important for legal reasons. When you provide attribution to CK-12 Foundation, you support the ability of our non-profit organization to make great educational experiences available to students around the world.Our Creative Commons License welcomes you to use our content and technology when you give us attribution. If you have any questions about our policies, contact us at support@ck12.org

In this activity, students investigate how a cell uses an enzyme to rid itself of a poisonous substance.

In this lesson, students investigate factors that affect the integrity of cell membranes. Beet tissues will be used as the model to investigate the types of environmental stresses that affect membrane integrity.

Students will read a passage and write answers to questions about the passage. This resource supports English language development for English language learners.

Looking for lichens is an activity that can be done almost anywhere. Students get to search for them in the playgrounds and schoolyards, and they can be used as an indicator of air quality.

This resource explain how different types of active transport occur and how the sodium-potassium pump functions. It includes diagrams, videos, practice questions, a study guide, flash cards, interactive assessments, and an article on real world applications.