be sure to correct and fix any mistakes in red on your paper! e337 powering cellular activities...
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E337 Powering Cellular Activities Review
Be sure to CORRECT and fix any mistakes in RED on your
paper!
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Cellular RespirationCellular Respiration: You may know that yeast is added to dough when bread is made. The dough is allowed to sit awhile, and it expands and rises. The texture becomes fluffier, and the dough becomes filled with holes and pores, like a sponge. But how does this relate to cellular respiration?
Answer: Bread rises because yeast is using sugar/food in the dough and going through cellular respiration and giving off carbon dioxide. That carbon dioxide causes bread to rise.
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How Cells Convert food to energy.#1 Similarities between respiration and photosynthesis? (we did this on our ET last class!)
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Respiration
Enzymes
+
+
+
Carbon Dioxide Water#1
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Photosynthesis
+ +Chlorophyll
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How Cells Convert food to energy.#1 Similarities between respiration and photosynthesis?
Almost reverse reactions. Products of respiration are the reactants of photosynthesis and vice versa!** However, in photosynthesis, light energy is converted to chemical energy and in respiration, chemical energy is converted to chemical energy.
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#2: glycolysis in cytoplasm; cellular respiration in the Mitochondria
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3. Why do plants needMitochondria?
Because plants need to use their food for energy for life processes! Convert chemical energy (glucose) to chemical energy (ATP)
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4. What evidence do you have that cellular respiration occurs in plant cells? Think back to the Elodea Photosynthesis lab. Bubbles formed. (During photosynthesis, O2 is produced & CO2 is produced during cellular respiration)
5. What gases did the plant exchange?CO2 & O2
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6.
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#6.Combustion of Methane: Burning Stuff
Heat Energy
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Respiration
enzymes
C6H12O6 + 6O2 6CO2 + 6H2O + Chemical EnergyCombustion heat
CH4 + 2O2 CO2 + 2 H2O + Chemical Energy
Notice Anything?
#7. Both Break Stuff down, Release Energy+ produce CO2
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Respiration
Enzymes
+
+
+
Carbon Dioxide Water
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Why you no catch on FIRE?
Enzymes
+
+
+
Enzymes Breaks Stuff Slowly, Release Energy Slowly
Keep You from Burning Up
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Uses O2
Doesn’t Use O2
36 ATP
More
Energy
2 ATP
Less Energy
#8
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1. What functions are ATP molecules needed for?ATP molecules are needed for basic cell functions
such as active transport, muscle contractions and biosynthesis of molecules.
2. What role does glucose play in cellular respiration?
Glucose provides the chemical energy that is converted to ATP (also chemical energy) during cellular respiration.
3. Why is cellular respiration important for all living things, including plants?Cellular respiration is important for all living
things because it provides the energy in the form of ATP that is necessary to carry out basic cellular processes.
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4. Photosynthesis vs Cellular Respiration
Photosynthesis Respiration
Releases Chemical
Energy=
Breaks Sugar
Stores Chemical
Energy=
Makes Sugar
Again, they are almost exact opposites!
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“Respiration During Exercise”
1. Your cells need a steady supply of ATP when you are sitting, but what happens when you exercise?
Cells need more energy so the rate of cellular respiration increases.
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“Respiration During Exercise”
2. What happens to carbon dioxide levels in your blood and your breathing rate when you exercise?CO2 levels increase, so our breathing rate increases to rid our body of the excess CO2.3. Why do they do this (increase the breathing rate)?To deliver oxygen to the bloodstream more quickly.
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#4. What role do aerobic and anaerobic respirations play in
your muscles?
Rapid breathing brings in more oxygen to muscle cells that have been lacking
oxygen and going through fermentation.
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#5.Why do your muscles burn when you run? Why do you get
sore the following day?Build up of H+
ions
Small muscle tears
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Ouch… H+ ions, they
BurnMan
O2 to the
rescue
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Lots of RespirationNeeds lots
Of O2
RequiresLots ofBlood
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Who likes STEAK?! White meat in
turkey/chicken? Not very red-not used much!
Dark meat? Found in the LEGS, which they use, so lots of muscle that had blood!
MUSCLE!
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Why is aerobic conditioning advantageous to athletes? Your answer should talk about ATP and mitochondria:
(1) During aerobic conditioning, muscle cells produce more mitochondria. This provides the potential for more efficient use of O2 & greater release of energy (ATP) during heavy use of muscles.
(2) Improves blood circulation to the muscles.
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