Lesson Plan - Get It!
These may look like complicated chemical compounds in the image above, but believe it or not, your cells know what they are and use them to energize their "trucking" system!
In the previous lessons in this Cell Transport series, found under Related Lessons in the right-hand sidebar, you learned about passive transport that allows cells to move materials without the use of cellular energy.
Active transport uses the same cell membrane to transport substances, but it requires energy to do so! As you watch the video below, jot down the answers to these questions:
- How are substances moving in active transport?
- What is the name of the energy molecule cells use to move materials?
- How are the three types of active transport different?
- How are exocytosis and endocytosis similar?
- How does pinocytosis work in cells?
Watch Active Transport, by Teacher's Pet, to find the answers:
You see that active transport moves substances against the concentration gradient. That is the opposite of passive transport, where molecules are separating out to achieve equal distribution.
- Can you imagine trying to fight against a large crowd of people exiting a movie theatre at once?
It would require a great deal of energy! Active transport in cells operates in the same way: molecules have to be pushed across the cell membrane using energy from adenine triphophate, or ATP.
- What do you think would happen if cells didn't have ATP? Discuss your learning with a parent or teacher.
In the Got It? section of this lesson, you will continue to explore active transport.