According to the video “The Biology of Skin Color”, what is the pigment in our skin that reflects or absorbs light? A. Magnesium B. Melatonin C. Melanin D. Chlorophyll
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According to the video “The Biology of Skin Color”, what is the pigment in our skin that reflects or absorbs light?
A. Magnesium
B. Melatonin
C. Melanin
D. Chlorophyll
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- According to the video “The Biology of Skin Color”, why are UV rays dangerous to our bodies? What can they do? A. UV rays can mutate the DNA in our skin cells B. UV rays can cause skin cancer C. UV rays can destroy folate D. All of the aboveHow 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.According to the video “The Biology of Skin Color”, why is UVB critical for humans? A. It helps our bodies break down Vitamin D, which can be toxic to our bodies. B. It helps our bodies synthesize Vitamin C, which we need in order to absorb calcium in our diet. C. UVB is not critical or useful for us. D. It helps our bodies synthesize Vitamin D, which we need in order to absorb calcium in our diet.
- According to the video “The Biology of Skin Color”, skin color is associated with other aspects of an individual’s appearance or their behavior. A. True B. FalseOur skin, when exposed to excess sunlight, becomes dark. This is because our skin pigments called: A. flavoxanthin B. melanin C. carotene D. XanthophyllIn addition to protection (physical and chemical barrier), the skin serves other functions. Which of the following is another vital function of the skin? a.It absorbs vitamin C so that the skin will not be subject to diseases. b.The cells of the epidermis store glucose as glycogen for energy. c.It aids in the transport of materials throughout the body. d.It converts modified epidermal cholesterol to a vitamin D precursor important to calcium metabolism.
- Which statement is accurate about melanin or melanocytes? a. Melanin is produced by cells that are located in the stratum spinosum. b. Melanin is a pigment that accumulates inside keratinocytes. c. Darker-skinned individuals have more melanocytes than lighter-skinned individuals. d. Albinism is caused by a lack of melanocytes in the body.As individuals age, the number of collagen fibers that are found in the dermis of the skin decreases. What are the results of decreased collagen fibers in the dermis? Select all that apply. A The skin loses firmness and becomes wrinkled B The skin develops necrosis and slowly begins to die. C The inflammation levels in the skin increase drastically. The wound healing process in the skin is slower.Basal cell carcinomas are the most common form of skin cancers in the United States and are frequently found on the head, neck, and arms. This cancer affects which cells? A. Langerhans cells of the stratum lucidum B. keratinocytes of the stratum spinosum C. melanocytes of the stratum basale D. basal cells of the stratum basale
- Which of the following molecules would you add to skin cells to reduce the chance of skin cancer? Select one: a. Oxygen b. Carotene c. Vitamin D3 d. Carbon dioxide e. MelaninFlamingos are not born pink, but through their diet absorb pigments that get deposited into their feathers which turns them from white to pink. Similarly, our own diet can effect the color of our skin if we were to eat high concentrations of food with absorbable pigments. For instance, if we ate a large amount of carrots and summer squash that contain beta-carotene, what color would you expect the skin to take on?' Yellow-green orange-green Yellow-orange RedMelanocytes and keratinocytes work together in protecting the skin from UV damage when keratinocytes ________ a.maintain the appropriate pH in order for the melanocyte to synthesize melanin granules. b.provide the melanocyte with nutrients necessary for melanin synthesis. c.maintain the appropriate temperature so the product of the melanocyte will not denature. d.accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer.