Exam (elaborations)
Chapter 20 Acid-Base Balance
Chapter 20 Acid-Base Balance
[Show more]
Content preview
Chapter 20: Acid-Base BalanceMULTIPLE CHOICE
1. pH is a measurement of the
a. hydrogen ion concentration of a solution
b. hydroxide ion concentration of a solution
c. amount of buffer needed in a solution
d. both b and c above
ANS: A DIF: Memorization REF: p. 445
OBJ: 1 TOP: pH of body fluids
2. A solution with a pH of 7.0
a. would have more hydrogen ions than hydroxide ions
b. would have fewer hydrogen ions than hydroxide ions
c. would have an equal number of hydrogen and hydroxide ions
d. would be an acid solution
ANS: C DIF: Application REF: p. 445 OBJ: 1
TOP: pH of body fluids
3. A solution with a pH of 9.0 would
a. be an acid solution
b. have fewer hydrogen ions than hydroxide ions
c. be neutral
d. have more hydrogen ions than hydroxide ions
ANS: B DIF: Application REF: p. 445 OBJ: 1
TOP: pH of body fluids
4. A solution with a pH of 5.0 would
a. be an acid solution
b. have more hydrogen ions than hydroxide ions
c. be neutral
d. both a and b above
ANS: D DIF: Application REF: p. 445 OBJ: 1
TOP: pH of body fluids
5. A solution with a pH of 7.0 would
a. have more hydrogen ions than hydroxide ions
b. be an acid solution
c. be a neutral solution
d. both a and c above
ANS: C DIF: Application REF: p. 445 OBJ: 1
TOP: pH of body fluids
6. If saliva has a pH of 7.7, arterial blood has a pH of 7.45. That means
a. arterial blood is more alkaline than saliva
b. arterial blood is more acid than saliva
, c. saliva has more hydrogen ions than arterial blood
d. both a and c above
ANS: B DIF: Application REF: p. 446 OBJ: 1
TOP: pH of body fluids
7. The mechanism used by the body to regulate body pH is
a. the buffer system
b. the respiratory mechanism
c. the urinary mechanism
d. all of the above
ANS: D DIF: Memorization REF: p. 447
OBJ: 2 TOP: Mechanisms that control pH of body fluids
8. The slightly lower pH of venous blood compared to arterial blood is caused by
a. the lower oxygen level of venous blood
b. the influx of lactic acid in venous blood
c. the influx of carbon dioxide in venous blood
d. all of the above
ANS: C DIF: Memorization REF: p. 447
OBJ: 2 TOP: Mechanisms that control pH of body fluids
9. The enzyme that converts carbon dioxide and water to carbonic acid is
a. carbonic anhydrase
b. carbaminohemoglobin
c. carbonate
d. carbon dioxidase
ANS: A DIF: Memorization REF: p. 447
OBJ: 2 TOP: Mechanisms that control pH of body fluids
10. Buffer pairs
a. absorb hydrogen ions
b. absorb hydroxide ions
c. prevent sharp changes in the pH of a solution
d. all of the above
ANS: D DIF: Memorization REF: p. 447
OBJ: 2 TOP: Buffers
11. Metabolism tends to add
a. more bases than acids to the blood
b. more acids than bases to the blood
c. about an equal amount of acids and bases
d. only neutral substances to the blood
ANS: B DIF: Memorization REF: p. 447
OBJ: 2 TOP: Buffers
12. The results of metabolic processes usually add
a. relatively weak bases to the blood
, b. relatively strong bases to the blood
c. relatively weak acids to the blood
d. relatively strong acids to the blood
ANS: D DIF: Memorization REF: p. 447
OBJ: 2 TOP: Buffers
13. Strong acids tend to
a. greatly raise the pH
b. greatly lower the pH
c. do not dissociate as much as weak acids
d. both a and b above
ANS: B DIF: Memorization REF: p. 447
OBJ: 2 TOP: Buffers
14. When the carbonic acid–sodium bicarbonate buffer pair buffers an acid
a. water is an end product
b. carbonic anhydrase reacts with the carbonic acid
c. more sodium bicarbonate is formed
d. more carbonic acid is formed
ANS: D DIF: Application REF: p. 448 OBJ: 2
TOP: Buffering action of sodium bicarbonate
15. When the carbonic acid–sodium bicarbonate buffer pair buffers an acid
a. the pH of the blood drops slightly
b. a weak acid is replaced by a strong acid
c. water is formed
d. both a and c above
ANS: A DIF: Application REF: p. 447 OBJ: 2
TOP: Buffers
16. When the carbonic acid–sodium bicarbonate buffer pair buffers a base
a. water is produced
b. hydrogen ions are added to the solution
c. more carbonic acid is produced
d. both b and c above
ANS: A DIF: Application REF: p. 448 OBJ: 2
TOP: Buffering action of carbonic acid
17. When the carbonic acid–sodium bicarbonate buffer pair buffers a base
a. sodium chloride is produced
b. water is produced
c. the pH rises less than it would if there were no buffer system
d. both b and c above
ANS: D DIF: Application REF: p. 448 OBJ: 2
TOP: Buffers
18. An increased respiration rate
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Approvedtutor. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
52928 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now