Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 41, Problem 11TYU
WRITE ABOUT A THEME: ORGANIZATION Hair is largely made up of the protein keratin. In a short essay (100-150 words), explain why a shampoo containing protein cannot replace the protein in damaged hair.
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Explain the changes that you observed in terms of change in protein structure at the molecular level of egg albumin
Hint: Discuss what interactions/bonds are disrupted upon application of the treatment on the egg albumin during denaturation
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Average skin (epidermal) cell has a diameter of 30 micrometers. The majority of the surface of the human body is covered by skin cells. The average surface area of an adult male is 1.9 m2 and an adult female is 1.6 m2.
1. Use this formula to determine the area an average skin cell covers: Area = π (radius)2 Plug the radius (1/2 the diameter) of an average skin cell into the equation.
area of an average skin cell ____________________
2. Next, convert your surface area (average male or female) from m2 into mm2
your surface area____________________
3. Then, divide your surface area by the average area of a skin cell.
number of skin cells covering your body ____________________
How were the hair different? How does eyebrow, eyelash and head hair are different?
Chapter 41 Solutions
Campbell Biology (11th Edition)
Ch. 41.1 - An animal requires 20 amino acids to make...Ch. 41.1 - Prob. 2CCCh. 41.1 - WHAT IF? If a zoo animal eating ample food shows...Ch. 41.2 - Prob. 1CCCh. 41.2 - In what sense are nutrients from a recently...Ch. 41.2 - Prob. 3CCCh. 41.3 - Explain why a proton pump inhibitor, such as the...Ch. 41.3 - Thinking about our nutritional needs and feeding...Ch. 41.3 - Prob. 3CCCh. 41.4 - Prob. 1CC
Ch. 41.4 - What features of a mammal's digestive system make...Ch. 41.4 - WHAT IF? "Lactose-intolerant" people have a...Ch. 41.5 - Explain how people can become obese even if their...Ch. 41.5 - WHAT IF? Suppose you were studying two groups of...Ch. 41.5 - Prob. 3CCCh. 41 - Prob. 41.1CRCh. 41 - Propose an artificial diet that would eliminate...Ch. 41 - Prob. 41.3CRCh. 41 - How does human anatomy indicate that our primate...Ch. 41 - Prob. 41.5CRCh. 41 - Fat digestion yields fatty acids and glycerol....Ch. 41 - The mammalian trachea and esophagus both connect...Ch. 41 - Which of the following organs is incorrectly...Ch. 41 - Prob. 4TYUCh. 41 - Prob. 5TYUCh. 41 - After surgical removal of the gallbladder, a...Ch. 41 - If you were to jog 1 km a few hours after lunch,...Ch. 41 - DRAW IT Create a flowchart to summarize the events...Ch. 41 - EVOLUTION CONNECTION Lizards and snakes cannot...Ch. 41 - SCIENTIFIC INQUIRY In human populations of...Ch. 41 - WRITE ABOUT A THEME: ORGANIZATION Hair is largely...Ch. 41 - SYNTHESIZE YOUR KNOWLEDGE Hummingbirds are well...
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- an average skin (epidermal) cell has a diameter of 30 micrometers. The majority of the surface of the human body is covered by skin cells. The average surface area of an adult male is 1.9 m2 and an adult female is 1.6 m2. Use the information above to calculate the approximate number of skin cells needed to cover the surface of your body (you can assume that you are an average human). Use this formula to determine the area an average skin cell covers: Area = π (radius)2 Plug the radius (1/2 the diameter) of an average skin cell into the equation. area of an average skin cell ____________________ Next, convert your surface area (average male or female) from m2 into mm2 your surface area____________________ Then, divide your surface area by the average area of a skin cell. number of skin cells covering your body ____________________arrow_forwardScreenshot for context. Can someone help me understand how do they come up with the surface area/volume ratio? (Biology-Cell)arrow_forward42 43 44arrow_forward
- A cut on the scalp is closed by cauterization (heat). Match the words in the left column to the appropriate blanks in the sentences on the right. disruption salt bridges hydrogen bonds and hydrophobic interactions denature replace bond with formation disulfide bonds Heat will surrounding proteins in the wound by causing Then, when healing, the proteins coagulate and form a scar. of Reset Helparrow_forwardIDENTIFICATION: 1. Which kind of endoplasmic reticulum is most abundant in epidermal cells producing waxes/cutin. 2. Communication between the cytoplasm and the nucleoplasm is provided for by this part of the nucleus? 3. A group of protein compounds that serves as chemical catalyst within the cytoplasm.arrow_forwardc. In lab, you recorded a UV-Vis spectrum of a mixture of proteins. What best explains why two major peaks were observed in your spectrum between 240 and 480 nm? i. Amino acids absorb light at two wavelengths depending on their identity. The sample was impure. All proteins absorb light at 280 due to the presence of aromatic amino acids and red proteins absorb light near 400 nm. The buffer absorbs light in the visible region and the proteins absorb light in the UV region of the spectrum. None of the above. ii. iii. iv. V. d. In lab, you ran an SDS-PAGE gel. What best explains the importance of adding SDS and heating your samples? i. SDS is a dye used for visualization and heat is used to dissolve the SDS in solution. iii. iv. SDS coats the protein with negative charge and heat aids in the unfolding of the proteins. SDS and heat both help stabilize the proteins during gel electrophoresis. SDS and heat both help break the peptide bonds of proteins, which is necessary for gel…arrow_forward
- Click and drag the appropriate tiles to label the indicated parts of a cell membrane (blue dots). Click and drag the appropriate tiles to the yellow dots to indicate which side of the membrane represents the outside surface of the cell and which side represents the inside of the cell (cytoplasm).arrow_forwardplease choose correct letter and explain a bit 1. The strongest way by which a protein can maintain its shape is by using:a) ionic bonds b) disulfide bonds c) star war forces d) van der Waals forces 2. If a cell (like an amoeba) would be capable of migrating from one place to another only with movement created from the inside of the cell, then we can say that that movement is done mainly by: a) glycoproteins b) feet c) microtubules d) actin filaments True or False: In eukaryotic cells (such as human cells), the variety and diversity of proteins is much less than the variety and diversity of lipids.arrow_forwardWhy are glycolipids important in the cell membranes? Group of answer choices Glycolipid helps the cell to provide additional surface area. Glycolipid helps the cell to regulate materials passing through the cell membrane. Glycolipid helps the cell to store sugar molecules Glycolipid helps the cell to recognize other cells of the body.arrow_forward
- label image from options given.arrow_forwardSelect the single best answer. The composition of a cell membrane is not uniform for all types of cells. Some cell membranes are more rigid than others. Rigidity is determined by a variety of factors, one of which is the structure of the carbon chains in the phospholipids that comprise the membrane. Two examples of phospholipids are shown below, with one having C-C double bonds in its carbon chains. Which phospholipid would be present in the more rigid cell membrane? CH2 Compound A: H-C- (CH3)9NCH,CH2-0-P-0-CH2 CH2-O Compound B: Н-с—о. (CHa)ÑCH,CH2-O-P-0-CH2 Compound A Compound Barrow_forwardview View Help O Editing AaBbCc AaBbCc No Spacing AaBbCc AaBbe Normal Heading 1 Heading Paragraph Styles 34) The RNA that has an anticodon and attaches to a specific amino acid is RNA. 35) T/F Buffers cause abrupt and large changes the pH of the body by releasing or binding H+ ions. 36) What is a dynamic equilibrium of your internal environment termed? 37) are membrane junctions that distribute tension across a sheet of cells. 38) T/F About 60% to 80% of the volume of most living cells consists of organic compounds. ictions: Onarrow_forward
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