Lecture 3

Lecture 3 - Channel Setting Instructions for ResponseCard...

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Unformatted text preview: Channel Setting Instructions for ResponseCard RF 1. Press and release the "GO" button. 2. While the light is flashing red and green, enter the 2 digit channel code (i.e. channel 1 = 01, channel 21 = 21). Set to Channel 44 by pressing “4”, then “4” 3. After the second digit is entered, Press and release the "GO" button. 4. Press and release the "1/A" button. The light should flash yellow to confirm. Lecture 3 Building Cells II: Biological Energy Concepts Ch. 3 pp. 83-115 Which is the “good” fat? 60% 40% 1. Left choice 2. Right choice Reactions are energetically unfavorable if the change in free energy, ∆ G , is ? 68% 8% 23% 1. positive 2. negative 3. zero How are energetically unfavorable reactions able to occur in cells? 1% 44% 5% 43% 6% 1. They don’t occur. 2. Coupling with the dissociation of activated carriers can make them run. 3. They typically run in reverse. 4. Equilibria are made more favorable by the activities of enzymes 5. None of the above Chapter 3 – Basic Principles of Energy in Biological Systems 1. Specific roles of energy in controlling processes 2. Equilibrium concepts and energy 3. Three strategies to accomplish unfavorable reactions A. Coupled reactions B. Activated carriers C. Enzymes – - Properties - V max and K m At most every scale, living organisms generate order Figure 3-3 Essential Cell Biology (© Garland Science 2010) • Because of the second law of thermodynamics, systems tend to move to maximum disorder or entropy • Organisms and cells generate order through their functions, thus to balance this increase in order heat is liberated to the environment Cells generate order and liberate heat in the process Figure 3-5 Essential Cell Biology (© Garland Science 2010) Figure 3-2 Essential Cell Biology (© Garland Science 2010) Cells harness the energy involved in generating precursor molecules from more complicated ones in foods The origin of much of the stored energy for these processes is from photosynthesis in organisms that become foods Figure 3-8 Essential Cell Biology (© Garland Science 2010) Figure 3-9 Essential Cell Biology (© Garland Science 2010) As we will see, much of this energy is converted into a...
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Lecture 3 - Channel Setting Instructions for ResponseCard...

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