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2.1 Section Objectives – page 35

2.1 Section Objectives – page 35. Today’s Objective:. To investigate and explain cellular processes, such as homeostasis, converting energy, the production of new materials, and transporting materials. Can be found in the book: Chapter 7.3. Section 3 Summary – page 179-187.

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2.1 Section Objectives – page 35

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  1. 2.1 Section Objectives – page 35 Today’s Objective: • To investigate and explain cellular processes, such as homeostasis, converting energy, the production of new materials, and transporting materials. Can be found in the book:Chapter 7.3

  2. Section 3 Summary – page 179-187 REMEMBER, cells have tiny organs inside them called organelles. Each organelle, just like the organs in your body, have a specific job they carry out for the cell’s survival.

  3. Also, REMEMBER some organelles have a membrane around them. What are they called? nucleus mitochondria While other organelles do not have a protective layer. ribosome

  4. Genetic Material The master set of directions for making proteins (making you) is contained in DNA. Prokaryotic cells only have one long strand of DNA Eukaryotic cells have different amounts of DNA (depending on what type of organism it is).

  5. Cell Control Center In prokaryotic cells, the DNA is found floating in the middle of the cell…. In eukaryotic cells, DNA is found inside the nucleus.

  6. Cell Control Center Just as every team needs a leader, the cell needs a leader to give directions. Nucleus The nucleus is the leader of the eukaryotic cell because it contains directions to make proteins. Every part of the cell depends on proteins, so by containing the blueprints to make proteins, the nucleus controls the actions of all the organelles.

  7. Homeostasis Section 3 Summary – page 179-187 Inside the cell Outside the cell Plasma membrane Plasma membrane • The plasma membrane (also called cell membrane) is a “skin” that covers the cell. • All cells (prokaryotic and eukaryotic) have a plasma membrane.

  8. Homeostasis Section 3 Summary – page 179-187 Outside the cell Plasma Membrane Inside the cell • The plasma membrane maintains homeostasis (an internal balance) by controlling what goes in and out of the cell.

  9. Energy Transformers Section 3 Summary – page 179-187 Cells have to transform energy in order to use it. There are two different organelles that do this as their job. CHLOROPLAST ● Has a membrane ● Only found in eukaryoticPLANT cells MITOCHONDRIA ● Has a membrane ● Found in ALLeukaryotic cells

  10. Chloroplasts: organelles that use light energy and transform it into food energy in eukaryoticPLANT cells. Section 3 Summary – page 179-187 PHOTOSYNTHESIS

  11. CHLOROPLAST Section 3 Summary – page 179-187 Chloroplasts contain green pigment called Chlorophyll traps energy from sunlight and gives leaves and stems their green color. chlorophyll Chloroplast Chlorophyll

  12. Energy Transformers Section 3 Summary – page 179-187 Mitochondria: membrane-bound organelles in ALLeukaryotic cells that transform food energy into chemical energy (that we use to perform all functions: walking, talking, thinking).

  13. Section 9.3 Summary – pages 231-237 Cellular respiration is the process by which mitochondria use food energy, and oxygen to create CO2 , water, and ATP (chemical energy)

  14. Cellular Respiration C6H12O6 6O2 → 6CO2 + 6H2O + 36ATP + Glucose Oxygen Gas Carbon Dioxide Water Energy It is the reverse process of photosynthesis

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