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Week 1 BIO 140 Cresawn Notes Pt. 2

by: Jay Ty

Week 1 BIO 140 Cresawn Notes Pt. 2 140

Marketplace > James Madison University > Biology > 140 > Week 1 BIO 140 Cresawn Notes Pt 2
Jay Ty
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About this Document

Hey guys, these notes are from the second day of classes this week! Let me know what you think, I hope they do the class justice <3 Study hard! <3
Foundations of Biology I
Kerry Creswawn
Class Notes
Biology, Science, life, pH, hydrogen, bonds, Chemistry, study, class, Cresawn, BIO140
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This 3 page Class Notes was uploaded by Jay Ty on Thursday September 8, 2016. The Class Notes belongs to 140 at James Madison University taught by Kerry Creswawn in Fall 2016. Since its upload, it has received 46 views. For similar materials see Foundations of Biology I in Biology at James Madison University.


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Date Created: 09/08/16
9.8.2016 Cresawn BIO 140 The Chemistry of Life I. Ionic Bonds a. So different, that electrons are not shared at all II. Truths About Hydrogen a. The electronegativity of hydrogen is closer to the electronegativity of carbon than it is to that of oxygen i. We know this based on how carbon and hydrogen interact ii. Hydrogen has only one electron iii. Hydrogen is partially charged, not full III. pH a. Greater H+ concentration= lower pH= more acidic b. Lower H+ concentration= higher pH= more basic i. Example: It is always represented as pH=7 = 10 −7 IV. A pH case of aspirin overdose a. The Basics: i. Running- 1. The reactants of this are oxygen and glucose (C6H12O6) 2. The products are CO2, H2O (water), and ATP 3. This causes the pH levels to decrease (increase in acidity) due to an increase in CO2 production 4. During aerobic metabolism (e.g., running), your muscle cells release carbon dioxide into your blood. When blood travels into the working muscles, oxygen is exchanged for carbon dioxide and hydrogen. a. The cells take in oxygen from the blood and the blood carries away carbon dioxide and hydrogen -- waste products of cellular metabolism. b. The combination of CO2 and H creates a reaction that causes acidity inside the bloodstream, which decreases the pH of your blood. (Find more on Livestrong’s site) ii. Hyperventilating- 1. By hyperventilating, you expel more CO2. By expelling more CO2, it is the body’s attempt to increase the pH (make the pH levels more basic, NOT acidic) 2. Carbon dioxide gets converted into bicarbonate and hydrogen ions. a. So a decrease in carbon dioxide levels in the blood will increase the pH of blood. i. The reason is because carbon dioxide breaks up into bicarbonate (H2CO3), which is a buffer used to maintain blood's pH. 1. But if there are not enough carbon dioxide molecules then there will be no dissociation and therefore an increase in pH. iii. “Normal” information- 1. A normal range for a person to live healthily is 7.35 to 7.45 (slightly alkaline). 2. Blood pH below 7 can lead to a coma and even death due to severe acidosis. 3. High blood pH (above 7.45) is called alkalosis. Severe alkalosis (when blood pH is more than 8) can also lead to death. iv. Calculating the difference in pH 1. Subtract the two values, with (original pH)-(new pH). This number will then be written in notation form. a. Example- pH of 10 goes down to a pH of 3. The difference is 7, or the new pH is pH=7. Which is then written in notation as pH = 10 −7


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