2. Levels of Organization – Cell Theory – Homeostasis

3. Levels of Organization – Cell Theory – Homeostasis

4. The Cell Theory
On an odd page write the question and answer OR restate the question in your answer.
What are the three postulates of the Cell Theory?
All living things are composed of cells
Cells are the basic unit of life
All cells come from preexisting cells
Who used one of the first microscope?
Robert Hooke and Leeuwenhoek
How did Leuwenhoek discover bacteria or animalcules?
He studied his own dental plaque and saw unicellular organisms through the microscope. pg

5. Cell and Homeostasis Reading – Weekly Grade Due end of class
Define homeostasis, cellular respiration , photosynthesis.
Cellular respiration and photosynthesis are related because both are responsible for making energy for the cell to function / photosynthesis’s output is CR’s input and CR’s output is Photosynthesis’s input.
Animal cells do not undergo photosynthesis because animals eat their food and get glucose that way, whereas plants make their food.
Organelles Responsible
Input
Output (waste products)
Photosynthesis
Chloroplast
Carbon dioxide and Sunlight
Glucose and Oxygen
Cellular Respiration
Mitochondria
Carbon dioxide and Energy for cell ( ATP)

6. Define cell membrane and diffusion.
Diffusion does not require energy.
When waste material builds up it acts as a poison to the cell.
Other materials move in opposite direction of diffusion and requires energy to transport the material.
The energy need to transport material across the cell membrane comes from cellular respiration.
Define cell division.
Multicellular organisms use cell division for growth and repair. Unicellular organisms use cell division for reproduction.

7. Photosynthesis and Cellular Respiration

10. How will you remember this organelle?
Lysosomes
Lysosomes clean the cell – Lysol cleans a house
Cell Wall
A wall is strong and sturdy – the cell wall is strong and protects the cell
Golgi Apparatus
Like the post office – sends and receives cell substances
Chloroplast
Takes in light energy to make food for cell
Vacuoles
Storage container
Cytoplasm
Cytoplasm is gel and hold organelles like hair-gel holds a persons hair
Ribosomes
Ribs are made of proteins – ribosomes make proteins and start with rib
Cell Membrane
Gate keeper of cell
Mitochondria
Powerhouse of the cell- makes energy
Nucleus
Brain of cell , controls all functions , contains the DNA
Endoplasmic Reticulum
Creates substances for the cell and helps ribosomes make proteins

11. Lesson Launcher 10/11
All living things contain carbon and are called organic. Anything that has never been alive is called inorganic. Carbon dating and radioactive dating use isotopes to date objects from the past. How is carbon dating and radioactive dating similar and different?
Carbon Dating
Both
Radioactive Dating
Organic objects ( living)
Accurate for 60,000
Example of organic: Bone Fossils , Dead leaves, animals
Use isotopes to date objects from the past
Can date things that were once alive
Organic molecules and inorganic molecules (living and nonliving)
+4.6 billion years old
Example of inorganic: rocks, water, dirt