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Respiration and Digestion

Lab #6 – Bio 101. Respiration and Digestion. What is cellular respiration?. A series of metabolic processes that use glucose to create ATP – adenosine triphosphate BUT! ...How do we get glucose? - Digestion Step-by-step breakdown basics:

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Respiration and Digestion

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  1. Lab #6 – Bio 101 Respiration and Digestion

  2. What is cellular respiration? A series of metabolic processes that use glucose to create ATP – adenosine triphosphate BUT! ...How do we get glucose? - Digestion Step-by-step breakdown basics: • Amylasein saliva starts to break down starches to disaccharides • Stomach acid breaks apart large structures such as cells and intercellular structures • Amylasein the small intestine completes the breakdown of all carbohydrates to disaccharides • Maltases, lactases, and sucrases break down disaccharides into monosaccharides • Glucose is brought to all the cells in the body through the circulatory system

  3. Cellular respiration – it’s a redox reaction Reminder: Oxidation and reduction OIL RIG Oxidation is “losing” Reduction is “gaining” Losing/gaining what? - Hydrogen atoms (usually) 38 ATP & Heat (Glucose molecule) (What you inhale) (What you exhale)

  4. Cellular respiration – inputs and outputs 3 stages of respiration: 1) glycolysis, 2) Kreb’s cycle (citric acid cycle), 3) electron transport

  5. Physiological implications of respiration: CO2 + H2O = H2CO3 …aka carbonic acid Homeostasis is regulated by the kidneys Too much respiration too quickly: Hyperventilation expels CO2 Reduction in carbonic acid which causes blood pH to rise  respiratory alkalosis = bad news Cool fact: This is the exact phenomena that leads to ocean acidification and coral reef bleaching!

  6. Respiration in plants Adult plants (This is not respiration… it’s the opposite. Whoa.) Seeds, during germination Starch = glucose stored as a polymer (polysaccharide) Process is exactly the same as animals…

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