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Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Cell Processes Photosynthesis (8) And Cellular Respiration (9)

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Page 1: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Cell Processes

Photosynthesis (8)

And

Cellular Respiration (9)

Page 2: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

AUTOTROPHS

• Living things depend on energy to exist.• Organisms that make the own food are

autotrophs• Plants and some other types of organisms

are able to use the light energy from the sun to produce food. What is the name of the process by which plants make their own food?

Page 3: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

PHOTOSYNTHESIS

Page 4: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Photosynethesis

• The process that coverts inorganic substances, CO2 and H2O, using the sun’s energy into an organic substance called glucose, C6H12O6

Page 5: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

• Chlorophyll – plants principal pigment that absorbs sunlight

Page 6: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

PHOTOSYNTHESISEQUATION

Page 7: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Leaf Parts

• Stoma (stomata) – small pores that act as a doorway for gases involved in photosynthesis (found mainly on the underside of leaves).

• Guard Cells – cells that regulate the opening of the stomata.

• Lower and upper epidermis – outer layer of a plant that serves for protection, like skin.

Page 8: Cell Processes Photosynthesis (8) And Cellular Respiration (9)
Page 9: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Stoma Open vs. Closed

• Open – with light and when guard cells are filled with water.

• Closed – without light and when guard cells are lacking water (dehydrated).

• Why is it important to have stomata open?

Closed vs. Open

Page 10: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Stomata Open vs. Closed

-Water -No Water -Light -Dark

Page 11: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Why is it important to have stomata open? GAS EXCHANGE for photosynthesis!

• When stomata are open gas exchange important for photosynthesis can occur.

• O2 can diffuse out and CO2 can diffuse in.

• Water can evaporate as well (transpiration)

Page 12: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

FACTORS THAT EFFECT PHOTOSYNTHESIS

• AMOUNT OF WATER

• TEMPERATURE

• INTENISTY OF LIGHT

Page 13: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Leaf Parts

• Stoma (stomata) – small pores that act as a doorway for gases involved in photosynthesis (found mainly on the underside of leaves).

• Guard Cells – cells that regulate the opening of the stomata.

• Lower and upper epidermis – outer layer of a plant that serves for protection, like skin.

Page 14: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Stoma Open vs. Closed

• Open – with light and when guard cells are filled with water.

• Closed – without light and when guard cells are lacking water (dehydrated).

• Why is it important to have stomata open?

Closed vs. Open

Page 15: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Stomata Open vs. Closed

-Water -No Water -Light -Dark

Page 16: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Why is it important to have stomata open? GAS EXCHANGE for photosynthesis!

• When stomata are open gas exchange important for photosynthesis can occur.

• O2 can diffuse out and CO2 can diffuse in.

• Water can evaporate as well (transpiration)

Page 17: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

How Does Osmosis determine if the Stomata are open or closed?

Page 18: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

HETEROTROPHS

• Organisms that obtain energy from the foods they consume are called heterotrophs. They cannot make the own food

Page 19: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Cellular Respiration

• Define cellular respiration – A process that releases energy by breaking

down food molecules in the presence of oxygen– Both plant and animal cells must undergo

cellular respiration– Process occurs in the mitochondria

Page 20: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Chemical Equation for Cellular Respiration

• The equation is the opposite of photosynthesis.

Page 21: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

CHEMICAL ENERGY AND ATP

• The activities of the cell are powered by chemical fuels. One of the principal chemical compounds that living things use to store energy is Adenine Triphosphate – ATP.

Page 22: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

ATP• One glucose molecule breaks down into about 36 ATP

molecules• ATP is a fully charged battery, ready to power the

machinery of the cell.

Page 23: Cell Processes Photosynthesis (8) And Cellular Respiration (9)

Energy

• Cells use energy for

– Active transport – Movement within the cell