Active versus Passive Transport
Learning Objective
I can compare and contrast active and passive transport across cell membranes.
Key Concepts
In diffusion, particles move from an area of high concentration to an area of low concentration, without using protein channels or ATP.
Active transport requires energy in the form of ATP to move molecules against their concentration gradients, often using carrier proteins like the sodium-potassium pump.
Endocytosis and exocytosis are forms of bulk transport that use vesicles to move large quantities of molecules across the cell membrane, requiring the cell to expend ATP.
Practice Questions
This lesson includes 12 practice questions to reinforce learning.
View questions preview
1. What is the primary difference between active and passive transport?
2. Which type of transport is responsible for maintaining dynamic homeostasis by constantly adjusting the internal environment of a cell?
3. Explain how the structure of the cell membrane (phospholipid bilayer) affects the movement of molecules across it.
...and 9 more questions
Educational Video
Active vs. Passive Transport: Compare and Contrast
BOGObiology