1. Introduction to Cells Table of Contents Discovering Cells
Looking Inside Cells
Chemical Compounds in Cells
The Cell in Its Environment

2. Discovering Cells Needs of Cells
A single cell has the same needs as an entire organism. What is the name of a material that moves?

3. Discovering Cells A Compound Microscope This microscope has a
Eyepiece
lens
Revolving
nosepiece
Lenses
Slide
Stage
Lens
Light rays
Light source
A Compound Microscope
This microscope has a
10x lens in the eyepiece. The revolving nosepiece holds three different lenses: 4x, 10x, and 40x.

4. Discovering Cells
Resolution

5. Looking Inside Cells A Typical Animal Cell
Each kind of cell structure has a different function within a cell. Where
is the cell membrane?

6. Looking Inside Cells Organelles of a Cell
Ribosomes
Chromatin
Nucleolus
Nuclear
envelope
Pores
What does the nuclear envelope do?
In what types of cells would
you expect to find a lot of mitochondria?
What do ribosomes do?
Organelles of a Cell
The structures of a cell look as different as their functions. Where do you find these structures in the cell diagram?

7. Looking Inside Cells Plant Cell
These illustrations show typical structures found in plant cells. What is the function of each structure?

8. Looking Inside Cells Animal Cell
These illustrations show typical structures found in animal cells. What is the function of each structure?

9. Looking Inside Cells
Compare and contrast the structures present in plant cells and animal cells.

10. Looking Inside Cells Golgi Apparatus
How can this sentence be completed? The Golgi Apparatus is an organelle that ___________ and ___________ materials made in the __________.

11. Looking Inside Cells Model for a Cell Function
How do the parts of a cell function in ways that are similar to the parts of a building?

12. Looking Inside Cells Chloroplast
A chloroplast captures energy from sunlight and changes it
to a form of energy cells can use in making food. Chloroplasts make leaves green because leaf cells contain many chloroplasts.

13. Looking Inside Cells Levels of Organization
Living things and nonliving things as well are organized in levels of increasing complexity. What are the levels of organization of your school building?

14. Chemical Compounds in Cells
Molecules and Compounds
Carbon dioxide is a compound. So is water.

15. Chemical Compounds in Cells
Compare and contrast the carbohydrates, lipids, and proteins.

16. Chemical Compounds in Cells
DNA
Smaller molecules connect in specific patterns and sequences, forming DNA. What would be the pattern of colors in the missing area?

17. Chemical Compounds in Cells
The graph compares the percentages of some compounds found in a bacterial cell and in an animal cell. What would be a good title for the graph?

18. Chemical Compounds in Cells
Mostly Water
About two thirds of
the human body is water. Complete the circle
graph to show the percentage of water
in your body.

19. The Cell in Its Environment
A Selective Barrier
In what way is the cell membrane like a gatekeeper?

20. The Cell in Its Environment
Diffusion
A drop of food coloring in a plate of gelatin gradually spreads as molecules of the dye diffuse. How would the third plate look if diffusion continues?

21. The Cell in Its Environment
Large Cell and Small Cell
How does the difference in the size of cells affect their processes?

22. The Cell in Its Environment
Crossing the
Cell Membrane
Molecules move into and out of
a cell by means of passive or active transport. Complete the boxes, and describe where the concentration of each substance is high or low.

23. The Cell in Its Environment
Water Molecule
Imagine that the yellow line is the cell membrane. What is the overall direction in which water will travel as a result of osmosis?