Transcript Energy Pathways and Anaerobic Metabolism
Numbered Heads Together How does the process of PSN and Cellular Respiration compare? How are they related? Equation for Photosynthesis: 6CO2 + 6H2O + Light Energy C6H12O6 + 6O2 Equation for Cellular Respiration: C6H12O6 + 6O2 6CO2 + 6H2O + ATP (Chemical Energy) Think-Pair-Share How would a drop in temperature most likely affect the processes of cellular respiration and photosynthesis? A) The rates of both cellular respiration and photosynthesis would decrease. B) The rates of both cellular respiration and photosynthesis would remain constant. C) The rate of photosynthesis would increase, and the rate of cellular respiration would decrease. D) The rate of photosynthesis would decrease, and the rate of cellular respiration would increase. Think-Pair-Share Which of these best explains the difference between the way animals and plants exchange gases with their environments? A) Animals use only photosynthesis, while plants use both photosynthesis and respiration. B) Animals use only respiration, while plants use both photosynthesis and respiration. C) Animals use both photosynthesis and respiration, while plants use only respiration. D) Animals use both photosynthesis and respiration, while plants use only photosynthesis. Energy Pathways EQ: How does your body meet the energy demands of various physical activities? Factors that determine which pathway your body takes… Intensity (effort) Duration http://hypoxiagym.com/ Anaerobic Metabolism ATP-CP a.k.a. Phosphogen pathway Fueled by stored ATP (2-3 sec) and ATP made by creatinephosphate (6-8 sec) Short and intense activity Anaerobic Glycolysis a.k.a. Lactic Acid System Fueled by carbs (sugars) Moderate and intense activity Up to 3min worth of ATP The Energy Pathways Continued... Aerobic Metabolism Aerobic Cellular Respiration Fueled by carbs, fats, and proteins Prolonged, low intensity exercise Almost unlimited ability to produce ATP…almost. www.Crossfit.com Think Pair Share Energy Pathway Recruitment Once your cells’ ATP stores are empty, your body comes to a fork in the road… Glycolysis 2 Pyruvate O2 absent Lactic Acid System O2 present Krebs Cycle (Citric Acid) Electron Transport Chain Lactic Acid System (p. 224-225) What are the effects of intense or prolonged exercise? Converts pyruvate into lactic acid. Very Fast, no additional ATP is produced. Muscle Fatigue (calcium leaks) Pain a.k.a. “the Burn” H+ levels increase…becomes more acidic. Irritates free nerve endings causing pain. Alcoholic Fermentation Converts pyruvic acid (pyruvate) into CO2 and Ethanol. No additional ATP are produced. Carried out by Yeast and some bacteria. Has many uses: How do the processes compare? Hmmm… Think-Pair-Share: Why do you suppose you continue to breath heavily after intense physical activity?