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					               Cell Energy

 How do cells get    Photosynthesis
  energy?             Respiration
             Photosynthesis

 What is            Process where cells
  photosynthesis?     take radiant (from the
                      sun) energy and
                      change it into food
              Photosynthesis

 How do cells use     Two step process
  radiant energy to     – Capture radiant energy
  make food?            – Produce sugar (food)
             Photosynthesis

 How do cells capture    Chloroplasts in plant
  radiant energy?          leaves and other green
                           plant parts absorb
                           radiant energy
                          Chlorophyll is the
                           green pigment
                           (chemical compound)
                           that does this
             Photosynthesis

 How do cells produce  Cells need H2O
  sugar from radiant     (absorbed from roots),
  energy?                CO2 (from air) and
                         radiant energy to make
                         sugar used as food
                        Photosynthesis formula
                        CO2 + H2O + radiant
                         energy       glucose +
                         O2
       Photosynthesis Formula

6CO2 + 6 H2O light           C6H12O6 + 6O2
(Carbon Dioxide + water )   ( glucose   +   oxygen)




Raw Materials                Products
Photosynthesis checkpoint

What organelle captures radiant energy?
  –   A. mitochondria
  –   B. vacuole
  –   C. chloroplast
  –   D. ribosome
Answer

C. The chloroplast contain a pigment call
  chlorophyll which captures radiant energy.
What are the raw materials of
photosynthesis?
 –   A. oxygen + carbon dioxide
 –   B. carbon dioxide + water
 –   C. water + sugar
 –   D. sugar + oxygen
Answer

B carbon dioxide and water are the raw
 materials that change into sugar and
 oxygen
What are the products of
photosynthesis?
 –   A. oxygen + carbon dioxide
 –   B. carbon dioxide + water
 –   C. water + sugar
 –   D. sugar + oxygen
Answer

D sugar and oxygen are produced from
 carbon dioxide and water.
                Respiration

 What is respiration?    Process where cells
                           use glucose to
                           produce energy
                Respiration

 How do cells use      Two step process
  glucose to produce     – Glucose is broken
  energy?                  down
                         – Smaller molecules of
                           broken down glucose
                           are used to produce
                           energy
               Respiration

 How does glucose get    Glucose enters
  into the cell?           through transport
                           proteins in the cell
                           membrane during
                           facilitated diffusion
                           and is broken down
                           into smaller
                           molecules in the
                           cytoplasm
              Respiration

 How is the energy  The broken down
  produced?           molecules enter the
                      mitochondria where they
                      are broken down more.
                     O2 and the smaller
                      molecules react creating
                      large amounts of energy
                     Glucose + O2
                      CO2 + H2O + Energy
         Respiration Formula

C6H12O6 + 6O2            6CO2 + 6 H2O
( glucose + oxygen)   (Carbon Dioxide + water )




Raw Materials          Products
                            A Cycle is Formed

 These processes form                                Respiration
  a cycle

                                O2    Animals use O2 from
                                      plants



Photosynthesis


                                           CO2
           Plants use CO2
           from animals
Respiration checkpoint

How does glucose enter the cell?
  –   A. active transport
  –   B. endocytosis
  –   C. osmosis
  –   D. facilitated diffusion
Answer

D glucose molecules attach to transport
  proteins in the cell membrane and enter the
  cell through facilitated diffusion.
Where does respiration take place?

 –   A. mitochondria
 –   B. vacuole
 –   C. chloroplast
 –   D. ribosome
Answer:

A – respiration takes place in the
  mitochondria.
What are the raw materials of
respiration?
 –   A. oxygen + carbon dioxide
 –   B. carbon dioxide + water
 –   C. water + sugar + energy
 –   D. sugar + oxygen
Answer

D sugar and oxygen are the raw materials
 in respiration
What are the products of
respiration?
 –   A. oxygen + carbon dioxide + energy
 –   B. carbon dioxide + water + energy
 –   C. water + sugar
 –   D. sugar + oxygen + energy
Answer

B carbon dioxide, water, and energy are
 the products from respiration
                Fermentation

 What is fermentation?    Breakdown of glucose to
                            produce energy when not
                            enough O2 is available.

                           Takes place in the
                            cytoplasm NOT the
                            mitochondria.

                           This process produces
                            wastes.
              Fermentation

 What wastes are    Lactic acid or
  produced?
                     Alcohol and CO2
            Fermentation

 Wastes?          Muscle cells produce
                    lactic acid which
                    makes the muscles
                    sore.

                   Bacteria produce
                    lactic acid which is
                    used in the production
                    of yogurt and some
                    chesses
             Fermentation

 Wastes continued…    Yeast use
                        fermentation to
                        produce alcohol and
                        CO2 . This process is
                        used to make bread
                        rise and wine.
Where does fermentation take
place?

 A. mitochondria
 B. chloroplasts
 C. cytoplasm
 D. vacuole
Answer:

C. the cytoplasm. When not enough O2 is
 available, the broken down glucose
 molecules make energy in the cytoplasm.
What are the products of
fermentation?
 –   A. carbon dioxide or water + glucose
 –   B. glucose or oxygen + lactic acid
 –   C. lactic acid or alcohol + oxygen
 –   D. alcohol or carbon dioxide + lactic acid
Answer:

C. Lactic acid or alcohol and carbon
 dioxide.
Muscles and some microorganisms
 produce lactic acid
Yeast produces alcohol and carbon dioxide
                 Explain

 Explain this        All living things get
  statement.           energy from the sun.
Make a multi-flow map of
    photosynthesis
Multi-flow photosynthesis

Carbon
dioxide
                            glucose



           Photosynthesis
  water


                            oxygen
 Radiant
 energy
Create a multi-flow map of
       respiration
          Multi-flow respiration

glucose                        Carbon
                               dioxide


                 Respiration
                               water




oxygen                         energy
Make a multi-flow map of
     fermentation
          Multi-flow of fermentation

                                Lactic
                                 acid


                fermentation
glucose                        alcohol



                               Carbon
                               dioxide
Compare/contrast respiration to
fermentation

How are the two processes similar?
How are the two processes different?


Draw a double bubble map to show the
 similarities and differences
Glucose is broken down              energy released       uses O2
Lactic acid               alcohol          CO2            H2O
              cytoplasm                    mitochondria




      Respiration                                Fermentation

				
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