1. Interest Grabber Are All Cells Alike?
Section 7-1
Are All Cells Alike?
All living things are made up of cells. Some organisms are composed of only one cell. Other organisms are made up of many cells.
1. What are the advantages of a one-celled organism?
2. What are the advantages of an organism that is made up of
many cells?
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2. Section Outline 7–1 Life Is Cellular A. The Cell Theory
B. Basic Cell Structures
C. Prokaryotes and Eukaryotes
1. Prokaryotes
2. Eukaryotes
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3. Prokaryotic and Eukaryotic Cells
Section 7-1
Cell membrane
Cytoplasm
Prokaryotic Cell
Nucleus
Eukaryotic Cell
Organelles
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4. Interest Grabber Division of Labor
Section 7-2
Division of Labor
A cell is made up of many parts with different functions that work together. Similarly, the parts of a computer work together to carry out different functions.
Working with a partner, answer the following questions.
1. What are some of the different parts of a computer? What are the functions of these computer parts?
2. How do the functions of these computer parts correspond to the functions of certain cell parts?
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5. Section Outline 7–2 Cell Structures A. Cell Wall B. Nucleus
1. Chromatin and Chromosomes
2. Nucleolus
3. Nuclear Envelope
C. Cytoskeleton
D. Organelles in the Cytoplasm
1. Ribosomes
2. Endoplasmic Reticulum
3. Golgi Apparatus
4. Lysosomes
5. Vacuoles
6. Chloroplasts
7. Mitochondria
E. Organelle DNA
F. The Cell as a Factory
G. Comparing Cells
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6. Venn Diagrams Prokaryotes Eukaryotes Animal Cells Plant Cells
Section 7-2
Prokaryotes
Eukaryotes
Nucleus
Endoplasmic reticulum
Golgi apparatus
Lysosomes
Vacuoles
Mitochondria
Cytoskeleton
Cell membrane
Ribosomes
Cell wall
Animal Cells
Plant Cells
Cell membrane
Ribosomes
Nucleus
Endoplasmic reticulum
Golgi apparatus
Vacuoles
Mitochondria
Cytoskeleton
Cell Wall
Chloroplasts
Lysosomes
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7. Figure 7-5 Plant and Animal Cells
Section 7-2
Nuclear
envelope
Ribosome
(attached)
(free)
Smooth endoplasmic
reticulum
Nucleus
Rough endoplasmic reticulum
Nucleolus
Golgi apparatus
Mitochondrian
Cell wall
Cell
Membrane
Chloroplast
Vacuole
Plant Cell
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8. Figure 7-5 Plant and Animal Cells
Section 7-2
Centrioles
Nucleolus
Nucleus
Nuclear
envelope
Rough
endoplasmic
reticulum
Golgi apparatus
Smooth
Mitochondrian
Cell
Membrane
Ribosome
(free)
(attached)
Animal Cell
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9. Figure 7-7 Cytoskeleton Cell membrane Endoplasmic reticulum
Section 7-2
Cell membrane
Endoplasmic
reticulum
Microtubule
Microfilament
Ribosomes
Michondrion
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10. Interest Grabber In or Out?
Section 7-3
In or Out?
How is a window screen similar to a cell membrane? Read on to find out.
1. What are some things that can pass through a window screen?
2. What are some things that cannot pass through a window screen? Why is it important to keep these things from moving through the screen?
3. The cell is surrounded by a cell membrane, which regulates what enters and leaves the cell. Why is it important to regulate what moves into and out of a cell?
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11. Section Outline 7–3 Movement Through the Membrane A. Cell Membrane
B. Diffusion
C. Osmosis
1. How Osmosis Works
2. Osmotic Pressure
D. Facilitated Diffusion
E. Active Transport
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12. Facilitated Diffusion
Section 7-3
Glucose
molecules
High
Concentration
Cell
Membrane
Protein
channel
Low
Concentration
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13. Figure 7-15 The Structure of the Cell Membrane
Section 7-3
Outside
of cell
Cell
membrane
Proteins
Protein
channel
Lipid bilayer
Carbohydrate
chains
Inside
of cell
(cytoplasm)
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14. Figure7-20 Active Transport
Section 7-3
Molecule to
be carried
Low
Concentration
Cell
Membrane
High
Concentration
Molecule
being carried
Low
Concentration
Cell
Membrane
High
Concentration
Energy
Energy
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15. Figure 7-17 Osmosis Cell membrane Section 7-3 Water molecules
Higher Concentration
of Water
Cell
membrane
Lower Concentration
of Water
Sugar molecules
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16. From Simple to More Complex
Interest Grabber
Section 7- 4
From Simple to More Complex
Many multicellular organisms have structures called organs that have a
specific function and work with other organs. Working together, these organs carry out the life processes of the entire organism.
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17. Interest Grabber continued
Section 7- 4
1. Some activities cannot be performed by only one person, but need a team of people. What type of activity requires a team of people to work together in order to complete a task?
2. What do you think are some characteristics of a successful team?
3. How is a multicellular organism similar to a successful team?
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18. Section Outline 7–4 The Diversity of Cellular Life
A. Unicellular Organisms
B. Multicellular Organisms
C. Levels of Organization
1. Cells
2. Tissues
3. Organs
4. Organ Systems
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19. Levels of Organization
Section 7- 4
Muscle cell
Smooth muscle tissue
Stomach
Digestive system
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