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EMU BIO 105 - Cell Metabolism
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BIO 105 1st Edition Lecture 14Outline of Last Lecture I. Review 4 Stepsa. Ingestionb. Digestionc. Absorptiond. ExcretionII. Chemical DigestionIII. Chemical AbsorptionIV. Excretiona. Nutritionb. Considering Obesityc. Nutritional Needsi. Building Blocks ii. Energy in foodiii. Essential Nutrients1. Essential fatty acids2. Essential amino acids 3. Vitaminsa. organic 4. Mineralsa. inorganicOutline of Current Lecture I. Cell Metabolisma. Why do we eatb. Where does energy come from?c. Cellular respirationi. What is cellular respirationii. Formula for energyiii. FermentationI. Organ Systemsa. Respiratory Systemb. Circulatory SystemCurrent LectureI. Cell MetabolismThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.a. Why do we eati. To obtain energyb. Where does energy come from?i. The sunii. Producersiii. Life requires energyiv. Chemical reactions require energy.v. Energy 1. Capacity to cause change (or) to perform work 2. Chemical energies power the reactions necessary for life.vi. Energy of chemical reactions1. Exergonic (OUT)a. Release energy2. Endergonic (IN)a. Input and storage of energyvii. Energy in the cell1. A living organism carries out thousands of endergonic and exergonic chemical reactions.2. Metabolisma. The total of an organism’s chemical reactionII. Cellular respirationa. Why do we breathe?i. We need cellular respirationb. What is cellular respirationi. Creating energy for the cellii. “The process of harvesting our food to make ATPc. Formula for energyi. Energy is in Glucoseii. 2 types of reactions (Redox)1. Reductiona. Adding an electron to an atom or molecule2. Oxidationa. Atom or molecule loses an electron3. As energy is transferred, electrons are transferred iii. In ->O1. Glucose 2. Oxygeniv. Out ->O1. Carbon Dioxide2. Water3. ATP (energy carrier)a. Electrons carry energyv. ATP (the energy currency molecule)1. Adenosine Tri (3)phosphate2. 3 Phosphates are held by high energy bonda. If they break apart lots of energy is released3. Bonds easily break apart4. Once 1 phosphate is taken out, ADP (adenosine diphosphate) is created to use as a “recycled” molecule if another phosphate becomes availablevi. 2 Other important molecules – intermediate energy transfer1. Glucose has lots of energy stored…a. Release energy by breaking molecule aparti. There’s too much energy for the cell to contain!1. Cycle uses a step process.vii. The “Steps”1. NADH2. FAPH23. 2 different states a. When picking up electronsi. NAD+ii. FADiii. Picks up hydrogen from glucoseb. With Hydrogen i. FADH2 ii. NADHiii. Electron Donorsiv. Donates H2 to O2III. Continued on 3/12/2015i. FermentationII. Organ Systemsa. Respiratory Systemb. Circulatory


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EMU BIO 105 - Cell Metabolism

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