Human Biology: Concepts and Current Issues
7th Edition
ISBN: 9780321821652
Author: Michael D. Johnson
Publisher: Benjamin Cummings
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Textbook Question
Chapter 2, Problem 5AWK
Coca-Cola is a very acidic drink; its pH is around 3. Blood has a pH of about 7. Yet when you drink a Coke the pH of the blood does not change measurably. Why is that?
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Trivalent and pentavalent arsenic produce different effects on cells, yet there is little distinction between the two forms of arsenic when discussing signs and symptoms of poisoning. Why?
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Your answer
Pure water has a pH of 7, the point
at which the concentrations of
hydrogen ions and hydroxide ions
are equal and water is considered
to have neutral pH. If an acid
is added to water, the pH value
because the acid releases
goes up above 7 ;
hydrogen ions
goes down below 7;
hydrogen ions
goes up above 7;
hydroxide ions
goes down below 7 ;
hydroxide ions
Is drinking alkaline water good for you?
should be an original thought, not Google’s
Chapter 2 Solutions
Human Biology: Concepts and Current Issues
Ch. 2 -
1. Who do you think should be responsible for...Ch. 2 - Prob. 2QCCh. 2 - Describe the electrical charges and relative...Ch. 2 -
2. Explain why two atoms of hydrogen tend to...Ch. 2 -
3. Explain why polar and charged molecules tend...Ch. 2 - How is a covalent bond different from an ionic...Ch. 2 - Compare and contrast potential energy and kinetic...Ch. 2 - Distinguish between saturated and unsaturated...Ch. 2 - Describe the process known as dehydration...Ch. 2 - Explain why proteins come in an almost unlimited...
Ch. 2 -
9. Discuss the importance of enzymes in living...Ch. 2 -
10. Describe the role of ATP in energy transfer...Ch. 2 - If a molecule of starch is repeatedly hydrolyzed,...Ch. 2 - Which of these molecules would be described as...Ch. 2 -
3. _______bonds form between the oxygen and...Ch. 2 - 13C and 14C are ______ of carbon. a. isotopes b....Ch. 2 - Which of the following substances has the lowest...Ch. 2 - When sugar is dissolved in water, sugar is the...Ch. 2 - A monosaccharide is to a polysaccharide as an...Ch. 2 -
8. Which of these bonds is the easiest to...Ch. 2 -
9. The primary structure of a protein is...Ch. 2 -
10. DNA ultimately contains the instructions for...Ch. 2 - If one strand of DNA has the sequence...Ch. 2 - Which of the following is true regarding the...Ch. 2 -
13. Which of the following is true regarding...Ch. 2 - Synthesis of proteins requires the input of...Ch. 2 - Prob. 15TYCh. 2 - Prob. 1AWKCh. 2 - Prob. 2AWKCh. 2 - Many people use cholesterol-lowering drugs to...Ch. 2 - Prob. 4AWKCh. 2 -
5. Coca-Cola is a very acidic drink; its pH is...Ch. 2 - Prob. 6AWK
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- The pH of lemon juice is about 2.0, whereas tomato juice’s pH is about 4.0. Approximately how much of an increase in hydrogen ion concentration is there between tomato juice and lemon juice? a. 2 times b. 10 times c. 100 times d. 1000 timesarrow_forwardUsing a pH meter, you find the pH of an unknown solution to be 8.0. How would you describe this solution? a. weakly acidic b. strongly acidic c. weakly basic d. strongly basicarrow_forwardWhen dissolved in water, a(n) _____ donates H+ and a(n) ______ accepts H+. a. acid; base b. base; acid c. buffer; solute d. base; bufferarrow_forward
- The table below shows the pH values of some different foods. pH of Foods Substance Approximate pH 7.96 Egg whites Graham crackers 7.92 Cranberry juice 2.30 Conch snails 8.40 Based on the pH level, which food is most likely to have a sour taste? A Egg Whites B Graham Crackers Cranberry Juice D Conch snailsarrow_forwardThere are two solutions with different pH levels. Solution A is neutral, with a pH of 7. Solution B is slightly alkaline, with a pH above 7. Two beakers are filled with of each solution (one for each solution). A phosphate buffer was added to it and CO2 was blown into it until there was a change of color meaning a change in pH. (this experiment is to see how the CO2 from the lungs can cause a pH change in water) Why does it take so long for the solutions to change color? Relate your answer to the equation (H2O + CO2 ⇌ H2CO3 ⇌ HCO3- + H+ ) and to the presence of the buffer.arrow_forwardLemon juice has a pH around 2.5. Milk has a pH around 6.5-7. Which of the following statements about these two liquids is true? Lemon juice has a higher concentration of hydrogen ions compared to milk Milk has a lower concentration of hydroxyl ions compared to lemon juice Milk has a higher concentration of hydrogen ions compared to lemon juice The concentration of water in lemon juice and milk is identicalarrow_forward
- An acid is a substance which raises hydrogen ion concentration O has a pH of 13 has equal number of H' and OH O raises hydroxyl ion concentrationarrow_forwardFrom your data in Table 8.2 choose the correct pH for household chemical listed here. pH 6 purple pH 4 darker 1. Lemon juice pink 2. Mr. Clean pH 10- 12 3. Shampoo bluish green 4. Baking soda solution pH 10 teal or blue 5. Vinegar pH 2 lighter pinkarrow_forwardنقطة واحدة The pH value is calculated mathematically as the Log of the * .hydrogen ion (H+) concentration False True Oarrow_forward
- Based on the pH of your drug, if your drug was in a high concentration in the blood,how would it affect the pH of your blood. Would it cause acidosis or alkalosis, and how would you treat this? drug Lipitor ph is 7 it's acidosis?arrow_forwardWhat is NOT TRUE about buffers ?arrow_forwardWhich of the following is (are) correct about the property of water? O Water dissolves foods allowing digestion O Water involves in chemical reactions in our body to produce and break down macromolecules O Water has value of specific heat making it a very stable solvent Water can form hydrogen bond with other molecules All of above are correctarrow_forward
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