2. Chapter 7 Cellular Structure and Function
Section 1: Cell Discovery and Theory
Section 2: The Plasma Membrane
Section 3: Structures and Organelles
Section 4: Cellular Transport

3. Movement of particles across the cell membrane without using energy
Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Passive Transport
Movement of particles across the cell membrane without using energy
Three Modes of Passive Transport
Diffusion
Facilitated Diffusion
Osmosis

4. Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Diffusion
Movement of particles from an area of high concentration to an area of lower concentration
Initial Conditions
Diffusion
Low
High
High
Low

5. Diffusion is controlled by
Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Diffusion is controlled by
Temperature
Pressure
Concentration
Dynamic Equilibrium
Reached when diffusion of material into the cell equals diffusion of material out of the cell
Molecules continue to move, but the overall concentration remains the same.

6. Diffusion in a Cell 7.4 Cellular Transport Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Diffusion in a Cell

7. Facilitated Diffusion
Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Facilitated Diffusion
Movement of materials across the plasma membrane using proteins

8. Channel Proteins Carrier Proteins 7.4 Cellular Transport Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Channel Proteins
Carrier Proteins

9. Chapter 7
Cellular Structure and Function

10. Diffusion of water across a selectively permeable membrane
Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Osmosis
Diffusion of water across a selectively permeable membrane
Three Types of Solutions
Isotonic
Hypotonic
Hypertonic

11. Chapter 7
Cellular Structure and Function

12. Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Isotonic Solution
Water and dissolved substances diffuse into and out of the cell at the same rate.
Plant Cell
Blood Cell
11,397x

13. Solute concentration is higher inside the cell.
Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Hypotonic Solution
Solute concentration is higher inside the cell.
Water diffuses into the cell.
Plant Cell
Blood Cell
13,000x

14. Solute concentration is higher outside the cell.
Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Hypertonic Solution
Solute concentration is higher outside the cell.
Water diffuses out of the cell.
Plant Cell
Blood Cell
13,000x

15. Active Transport Using Carrier Proteins
Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Active Transport
Movement of particles across the cell membrane using energy
Active Transport Using Carrier Proteins

16. Types of Active Transport Pumps
Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Types of Active Transport Pumps
Na+/K+ ATPase pump
Moves three Na+ ions out of the cell and two K+ ions into the cell
Sodium-Potassium Pump

17. Process by which the cell surrounds and takes particles into the cell
Chapter 7
Cellular Structure and Function
7.4 Cellular Transport
Endocytosis
Process by which the cell surrounds and takes particles into the cell
Exocytosis
Secretion of material out of the plasma membrane

18. Which type of cellular transport does not require an input of energy?
Chapter 7
Cellular Structure and Function
7.4 Formative Questions
Which type of cellular transport does not
require an input of energy?
active transport
endocytosis
exocytosis
facilitated diffusion

19. How does osmosis occur between the
Chapter 7
Cellular Structure and Function
7.4 Formative Questions
How does osmosis occur between the
two solutions separated by the selectively
permeable membrane?

20. Sugar moves to the right. Water moves to the left.
Chapter 7
Cellular Structure and Function
7.4 Formative Questions
Sugar moves to the left.
Sugar moves to the right.
Water moves to the left.
Water moves to the right.

21. Which diagram shows a cell in a hypotonic solution?
Chapter 7
Cellular Structure and Function
7.4 Formative Questions
Which diagram shows a cell in a hypotonic
solution?

22. _______ is the net movement of particles from
Chapter 7
Cellular Structure and Function
Chapter Assessment Questions
_______ is the net movement of particles from
an area where there are many particles of the
substance to an area where there are fewer
particles of the substance.
Diffusion
Endocytosis
Exocytosis
Equilibrium

23. Why are the carrier proteins that move
Chapter 7
Cellular Structure and Function
Standardized Test Practice
Why are the carrier proteins that move
substances across a plasma membrane
from a region of lower concentration to
a region of higher concentration called
pumps?

24. They require energy to move substances
Chapter 7
Cellular Structure and Function
Standardized Test Practice
They require energy to move substances
against a concentration gradient.
They open and close to allow substances
to diffuse across the plasma membrane.
They help with the osmosis of water
through the plasma membrane.
They pump water into the cell, causing
the pressure within the cell to increase.

25. Section 4 Vocabulary diffusion dynamic equilibrium
Chapter 7
Cellular Structure and Function
Vocabulary
Section 4
diffusion
dynamic equilibrium
facilitated diffusion
osmosis
isotonic solution
hypotonic solution
hypertonic solution
active transport
endocytosis
exocytosis