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EBK ESSENTIALS OF HUMAN ANATOMY & PHYSI
12th Edition
ISBN: 8220103633604
Author: KELLER
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem 5MC
In investigating the cause of thinning hair, which of the following questions needs to be asked?
a. Is the diet deficient in proteins?
b. Is the person taking megadoses of vitamin C?
c. Has the person been exposed to excessive radiation?
d. Has the person recently suffered severe emotional trauma?
Expert Solution & Answer
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Glu-His-Trp-Ser-Gly-Leu-Arg-Pro-Gly
The pKa values for the peptide's side chains, terminal amino groups, and carboxyl groups are provided in the table.
Amino acid Amino pKa Carboxyl pKa Side-chain pKa
glutamate
9.60
2.34
histidine
9.17
1.82
4.25
6.00
tryptophan
9.39
2.38
serine
9.15
2.21
glycine
9.60
2.34
leucine
9.60
2.36
arginine
9.04
2.17
12.48
proline
10.96
1.99
Calculate the net charge of the molecule at pH 3.
net charge at pH 3:
Calculate the net charge of the molecule at pH 8.
net charge at pH 8:
Calculate the net charge of the molecule at pH 11.
net charge at pH 11:
Estimate the isoelectric point (pl) for this peptide.
pl:
Biology Question
Chapter 4 Solutions
EBK ESSENTIALS OF HUMAN ANATOMY & PHYSI
Ch. 4 - Select the one false statement about mucous and...Ch. 4 - 2. Serous membranes
a. line the mouth.
b. have...Ch. 4 - 3. Which is not a component of sweat?
a....Ch. 4 - Which structure is not associated with a hair? a....Ch. 4 - In investigating the cause of thinning hair, which...Ch. 4 - Which structure is not associated with a nail? a....Ch. 4 - 7. Which one of the following is not associated...Ch. 4 - Which of the following is not a skin structure? a....Ch. 4 - 9. Match the structures of the right with their...Ch. 4 - 10. What is the name of the connective tissue...
Ch. 4 - From what types of damage does the skin protect...Ch. 4 - Explain why we become tanned after sitting in the...Ch. 4 - Prob. 13SAECh. 4 - 14. Name two different categories of skin...Ch. 4 - How does the skin help to regulate body...Ch. 4 - Prob. 16SAECh. 4 - Prob. 17SAECh. 4 - Which skin cancer arises from the youngest...Ch. 4 - Why does hair turn gray?Ch. 4 - 20. Name three changes that occur in the skin as...Ch. 4 - Is a bald man really hairless? Explain.Ch. 4 - Contrast the secretions of eccrine and apocrine...Ch. 4 - Prob. 23SAECh. 4 - Prob. 24CTCh. 4 - 25. Both newborn infants and aged individuals have...Ch. 4 - A 40-year-old beachboy is complaining to you that...Ch. 4 - Prob. 27CTCh. 4 - The water of a swimming pool is hypotonic to our...Ch. 4 - 29. Mr. Rossi, a fisherman in his late sixties,...Ch. 4 - Mr. Grayson is receiving a drug treatment...Ch. 4 - 31. Which type of injection would allow a drug to...Ch. 4 - Prob. 32CTCh. 4 - Prob. 33CT
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