2-17-10pHGuardCellsGraphs

2-17-10pHGuardCellsGraphs - BIOL13100 Biology II:...

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BIOL13100 Biology II: Development, Structure, and Function of Organisms February 17, 2010 Dr. Nancy Pelaez Lilly G-224 [email protected]
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Figure 2-5b Polar covalent bonds in water molecule Electrons are not shared equally, so partial charges exist on the O and H atoms
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Make a graph of pH vs hydrogen (hydronium) ion concentration over the pH range of 8.0 to 6.5, in 0.1 pH unit increments. Put pH on the x- axis (properly labeled) and hydrogen ion concentration on the y-axis. Neutral Oven cleaner Household bleach Household ammonia Milk of magnesia Baking soda Seawater Human blood Pure water Milk Urine Black coffee Tomatoes Wine Vinegar, soft drinks, beer Lemon juice Stomach acid Hydronium ion is a water molecule with an extra proton (hydrogen ion) attached to it
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pH problems are deadly in animals
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Table 2-3 Hydrogen ions are accepted by functional groups that are bases (amino group) Hydrogen ions are released by acidic functional groups (carboxyl group)
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Table 2-3 Phosphate is an acidic functional group Notice and correct one error for an acidic functional group on this page. Notice and correct another error for a functional group that’s a base on this page.
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A guard cell from a closed stomata. The cell has low concentrations of K and Cl, a relatively high water potential, and low turgor pressure.
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ATP ADP H + ? Blue light V m K + H + Cl - H 2 O Outline of a guard cell from a closed stomata.
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Acidification of extracellular fluid near guard cells in response to blue light.
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STOMATA OPEN IN RESPONSE TO BLUE LIGHT . Blue light strikes photoreceptor. 1. Pumping by H + -ATPases increases. Protons leave guard cells. 2.
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This note was uploaded on 02/22/2010 for the course BIO 135 taught by Professor ??? during the Spring '10 term at Purdue.

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2-17-10pHGuardCellsGraphs - BIOL13100 Biology II:...

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