Set up Cornell Notes on
pg. 35
Topic: 3.5 Active
Transport
Essential Question:
Explain how exocytosis
and endocytosis differ
from diffusion
3.5
Active Transport
2.1 Atoms,
Ions,
and Molecules
Explain how exocytosis and endocytosis
differ from diffusion
Key Concept: Cells use energy
to transport materials that
cannot diffuse across a
membrane
Endocytosis
Exocytosis
Endo vs. Exocytosis: Double-Bubble
Pg. 34
3.5 Active Transport, Endocytosis, and Exocytosis
energy
KEY CONCEPT Cells use
to transport
materials that cannot diffuse across a membrane.
3.5 Active Transport, Endocytosis, and Exocytosis
Active transport requires 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
3.5 Active Transport, Endocytosis, and Exocytosis
• Energy=(ATP).
• Uses transport protein
pumps.
• Cells use active transport
to maintain homeostasis
(balance).
3.5 Active Transport, Endocytosis, and Exocytosis
• Endocytosis is the process of
taking material into the cell.
Draw on the top of pg. 34
• Phagocytosis is a type of
endocytosis in which the cell
membrane engulfs large
particles.
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. 34
3.5 Active Transport, Endocytosis, and Exocytosis
Homework:
On the bottom of pg. 34:
Please create a double-bubble
comparing and contrasting
exocytosis and endocytosis