Cells: Life in Balance I. Why does “Balance” matter?
• Consider for a moment the importance of a space suit for astronauts to walk in space. Without the space suit, or a barrier between an “internal” and “external” environment, the astronauts would die.
• Living organisms must maintain certain conditions in their bodies to stay alive. II. What is Homeostasis?
Definition:
Examples:
What one word summarizes what homeostasis really means? ______________
What is the primary unit of life? The cell is the primary unit of life. It isn’t just a bag of goo, it is an elaborate, efficient machine containing specialized parts that enable us to live.
III.Cell Theory:
1.
2.
3.
IV.Types of Cells: Cells are organized by how complex
they may be A. Prokaryotes:
B. Eukaryotes:
1.
Cells are like tiny organisms. Organisms are composed of organ systems, and those organ systems are composed of organs. Eukaryotic cells are composed of organelles, each of which has a specific job it needs to do to keep the cell alive.
Organelles: 1. Cell Membrane:
• Analogy =
a. AKA: b. Semi Permeable =
2. Nucleus:
1.Contains:
C. Analogy =
3. Ribosomes: There are hundreds of these round structures in each cell. They are responsible for manufacturing proteins. A. B. C. • Analogy =
4. Mitochondrion: A. B. • Analogy =
5. Endoplasmic Reticulum (ER):
A. Rough ER –
B. Smooth ER –
C. Analogy =
6. Golgi Apparatus:
• Analogy =
7. Centrioles:
• Analogy =
8. Cytoplasm:
A. Cytosol =
Analogy =
Plant cells contain the same organelles as animal cells, plus 3 specialized organelles:
a. Chloroplast:
A.
• Analogy =
b. Vacuole:
• Analogy =
c. Cell Wall:
• Analogy =
ANIMAL CELLL PLANT CELL