PRIN OF ANATOMY & PHYS 16E 2 SEM ACCESS
PRIN OF ANATOMY & PHYS 16E 2 SEM ACCESS
16th Edition
ISBN: 9781119704607
Author: Tortora
Publisher: WILEY
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Chapter 5, Problem 2CTQ

Josie reassures her mother that the tattoo she received at the tattoo parlor will eventually disappear. She knows this because she has learned in biology class that skin cells are shed every four weeks. Is Josie correct?

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Ashley’s friend tells her that blackheads form due to the accumulation of dirt, and a mild facewash can effectively get rid of them. Is she correct in saying this?
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…
Select the best answer or answers from the choices given: Skin color is determined by (a) the amount of blood, (b) pigments, (c) oxygenation level of the blood, (d) all of these.
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