Loose Leaf For Integrated Principles Of Zoology
18th Edition
ISBN: 9781260411140
Author: Cleveland P Hickman Jr. Emeritus, Susan L. Keen, David J Eisenhour Professor PhD, Allan Larson, Helen I'Anson Associate Professor of Biology
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 29, Problem 4RQ
As “naked apes” humans lack the protective investment of fur that shields other mammals from the damaging effects of sunlight. How does human skin respond to ultraviolet radiation in the short term and with continued exposure?
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Students have asked these similar questions
Describe the relationship between melanin and UV light exposure in the human population. Include a description of both the effects of UV light on a person and function of melanin.
Vitamin D and folate levels in the blood are both affected by UV light. Describe the predicted effects of using a tanning booth (which exposes skin to UV light) on the blood levels of these two vitamins.
What is the only statement that correctly identifies the ability of different wavelengths of UV light to penetrate the human skin?
Note: UVA is the longest wavelength (least energy), and UVC is the shortest wavelength (most energy). If you've studied the electromagnetic spectrum you may remember that wavelength and energy have an inverse relationship. We'll talk more about this later in the course.
Group of answer choices
A- UVA light penetrates only as deep as the epidermis, which is where it has its effect
B-UVB light penetrates only as deep as the epidermis, which is where it has its effect
C-UVC light penetrates only as deep as the epidermis, which is where it has its effect
Chapter 29 Solutions
Loose Leaf For Integrated Principles Of Zoology
Ch. 29 - The arthropod exoskeleton is the most complex of...Ch. 29 - Distinguish between epidermis and dermis in...Ch. 29 - Prob. 3RQCh. 29 - As naked apes humans lack the protective...Ch. 29 - Prob. 5RQCh. 29 - Prob. 6RQCh. 29 - What is the difference between endochondral and...Ch. 29 - Discuss the role of osteoclasts, osteoblasts,...Ch. 29 - The laws of scaling tell us that doubling the...Ch. 29 - Prob. 10RQ
Ch. 29 - Prob. 11RQCh. 29 - Prob. 12RQCh. 29 - What functional features of molluscan smooth...Ch. 29 - Prob. 14RQCh. 29 - While the sarcoplasmic reticulum of muscle was...Ch. 29 - The filaments of skeletal muscle are moved by free...Ch. 29 - During evolution, skeletal muscle became adapted...Ch. 29 - A weight lifter decides to go jogging with a...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Explain the cellular and molecular mechanisms that determine the color of human skin.arrow_forwardWhat limited protection do cells have against the damaging effects of UV radiation?arrow_forwardCells of the epidermis derive from stem cells of the stratum basale. Describe how the cells change as they become integrated into the different layers of the epidermis.arrow_forward
- Briefly describe how melanin provides protection for our skin and describe what physiological and anatomical changes occur to your skin when you have excessive sun exposure.arrow_forwardCan you explain in detail the derivatives of dermis in mammals?arrow_forwardIn albinism, the formation of melanin, a dark skin pigment, are blocked so that albinosarrow_forward
- Why does skin usually get darker if it is exposed to a lot of sunlight?arrow_forwardList the functions of human skinarrow_forwardHow do melanocytes and keratinocytes work together to protect the skin from UV damage? a. Keratinocytes maintain the proper pH for melanocytes to synthesize melanin granules. b. Keratinocytes provide the melanocyte with nutrients critical for melanin synthesis. c. Keratinocytes maintain the appropriate temperature so the melanin will not denature. d. Keratinocytes accumulate melanin granules to shield the keratinocyte’s DNA.arrow_forward
- Watch the film from time stamp 12:19 minutes to 13:32 minutes. Pause when Dr. Jablonski says, “That is what melanin does.” In this segment of the film, Dr. Jablonski references a paper she had read about the connection between UV exposure and the essential nutrient folate (a B vitamin), which circulates throughout the body in the blood. The paper, published in 1978, describes how the serum (blood) folate concentrations differed between two groups of light-skinned people. You will now look at one of the figures from that paper. Figure 3. Folate Levels in Two Groups of People. In one group (“patients”), 10 individuals were exposed to intense UV light for at least 30–60 minutes once or twice a week for three months. Sixty-four individuals not receiving this treatment (“normal”) served as the control group. The difference between the two groups was statistically significant (p < 0.005). Brackets represent the standard error of the mean, and “ng/mL” means “nanograms per…arrow_forwardCells of the epidermis derive from stem cells of the stratum basale. Describe how the cells change as they become integrated into the different layers of the epidermis. What determines the color of skin, and what Is the process that darkens skin when it is exposed to UV light?arrow_forwardWhat is the role of Skin receptors?arrow_forward
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