Set up Cornell Notes on pg. 33 Topic: 3.5 Active Transport Essential Question :

1. 3.5 Active Transport • 2.1 Atoms, Ions, and Molecules • Set up Cornell Notes on pg. 33 • Topic: 3.5 Active Transport • Essential Question: • Explain how exocytosis and endocytosis differ from diffusion • Explain how exocytosis and endocytosis differ from diffusion • Key Concept: Cells use energy to transport materials that cannot diffuse across a membrane

2. Endocytosis • Exocytosis • Endo vs. Exocytosis: Double-Bubble • Pg. 32

3. 3.5 Active Transport, Endocytosis, and Exocytosis • KEY CONCEPT Cells use energy to transport materials that cannot diffuse across a membrane.

4. 3.5 Active Transport, Endocytosis, and Exocytosis • Active transportrequires energy input from a cell and enables a cell to move a substance against its concentration gradient. • Drives molecules from a region of lower concentration to a region of higher concentration • Low • High • Low High

5. 3.5 Active Transport, Endocytosis, and Exocytosis • Energy=(ATP). • Uses transport protein pumps. • Cells use active transport to maintain homeostasis (balance).

6. 3.5 Active Transport, Endocytosis, and Exocytosis • Phagocytosis is a type of endocytosis in which the cell membrane engulfs large particles. • Endocytosis is the process of taking material into the cell. • Draw on the top of pg. 32

7. 3.5 Active Transport, Endocytosis, and Exocytosis • Exocytosis is the process of expelling material from the cell. • Opposite of endocytosis • Draw on the middle of pg. 32

8. 3.5 Active Transport, Endocytosis, and Exocytosis • Homework: • On the bottom of pg. 32: • Please create a double-bubble comparing and contrasting exocytosis and endocytosis