Cellular Respiration Releasing Chemical Energy December 1 Warmup
Cellular Respiration Releasing Chemical Energy
December 1. Warm-up #1 due now 2. Cell Respiration notes 3. Activity th 8 Capture- take into one's possession or control by force. Product -a chemical substance formed as a result of a chemical reaction
Introduction • All organisms must have energy to carry out life processes. • So where does this energy come from?
I. Cellular Respiration • DEFINITION: The breakdown of glucose to release energy (ATP) for the cell to do work. • Energy is stored during photosynthesis. • Energy is released during cellular respiration.
• Cellular respiration occurs in the cells of both autotrophs (plants) and heterotrophs (animals). • Cellular respiration takes place in the mitochondria. Animal Cell Plant Cell
• Cristae are the internal compartments formed by the inner membrane of a mitochondrion. • They increase the surface area and help the mitochondria to function very efficiently.
II. Types of Cellular Respiration • There are two types of cellular respiration: – AEROBIC – with oxygen – ANAEROBIC – without oxygen
A. Aerobic Respiration – with oxygen 1. Glycolysis – breakdown of a glucose molecule into 2 pyruvic acids, NADH & ATP in the cytoplasm 2. Krebs Cycle – occurs in the mitochondria 3. Electron Transport Chain – occurs in the mitochondria; more ATP is produced 4. One molecule of glucose produces 36 molecules of ATP
Chemical equation for aerobic respiration C 6 H 12 O 6 + 6 O 2 glucose 6 CO 2 + 6 H 2 O + ATP + oxygen yields carbon + dioxide water + energy
B. Anaerobic Respiration – without oxygen 1. Glycolysis – breakdown of glucose into two pyruvic acids 2. Fermentation occurs if the process continues without oxygen
a. Alcoholic fermentation in yeasts and bacteria produces ethyl alcohol, CO 2 & 2 ATP – Used in baking bread and making beer and wine
b. Lactic acid fermentation in animals produces lactic acid & 2 ATP; causes muscle soreness during heavy exercise
III. Comparing Photosynthesis & Cellular Respiration Photosynthesis Cellular Respiration Function Energy storage Energy release Location Chloroplasts Mitochondria Reactants CO 2 and H 2 O C 6 H 12 O 6 and O 2 Products CO 2 and H 2 O C 6 H 12 O 6 and O 2 Notice that the products of photosynthesis are the reactants of cellular respiration. And the products of cellular respiration are the reactants of photosynthesis.
Photosynthesis Cellular Respiration
- Slides: 15