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Q: During a tattoo, a needle is injected into the skin as ink is let out. The dye remains in the skin, thus giving the person a permanent design embedded in their skin. Into which layer of the skin do tattoos take place? A epidermis B dermis C subcutaneous layer D cuticle Tags: Skin |

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Q: Which of the following types of radiation is most likely to collide with molecules in epithelial cells? A Alpha B Beta C Gamma D Positron Tags: Skin | Nuclear Chemistry |

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Q: Arrector pili muscles are smooth muscles which associate with the dermal region of hair follicles in mammals. The contraction of these muscles results in hairs to stand on end. This can be especially seen in house cats when they are distressed or scared. Which of the following is false regarding these muscles? A There is little to no vasculature in the region these muscles are found B Innervation of the muscles is by the sympathetic branch of the autonomic nervous system C These muscles lack striations D Contraction of these muscles is due to increases in intracellular calcium concentration Tags: Musculoskeletal System | Skin |

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Q: Overexposure to sunlight increases the risk of skin cancer by increasing mutation rates and also depressing the local immune system. Basal cell carcinoma is a particularly common type of skin cancer considered to be nonlethal. Which of the following would be considered a risk factor for basal cell carcinoma? A lung cancer B physical damage to the skin such as a cut C anemia D HIV Tags: Mitosis and Meiosis | Skin |

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Q: Humans can survive for sustained periods of time in temperatures above body temperature (37 °C). The body is able to deal with these higher temperatures by releasing sweat, which, upon evaporation, releases heat energy from the skin. Which of the following would prevent human survival only if the ambient temperature is near or above 37 °C? A The relative humidity of the air reaches 100% B Dehydration C Lack of access to a breeze or other air current D Inability to perspire Tags: Skin |

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Q: Cephalopods like cuttlefish contain chromatophores which are specialized pigment-containing organelles in cells. These cells most closely resemble which of the following mammalian cells? A erythrocytes B hepatocytes C adipocytes D melanocytes Tags: Eukaryotic Cells | Skin |

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Q: Arrector pili muscles are small smooth muscles attached to hair follicles that raise the hairs under conditions of stress or cold. Which of the following statements is true regarding arrector pili muscles? A Arrector pili muscles are under the control of the somatic nervous system. B Contraction of the arrector pili muscles is stimulated by the sympathetic nervous system. C Arrector pili muscles cells are separated by Z disks. D Arrector pili muscles are under conscious control. Tags: Nervous System | Skin |

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Q: Vasodilation in dermal capillaries would most likely lead to which of the following? A Loss of body heat B Decreased urine filtration C Increase in blood pressure D Increase in blood CO2 levels Tags: Circulatory System | Skin |

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Q: Skin grafts remove a thin layer of skin for transplantation to cover another damaged area. When the graft is removed from the donor tissue, bleeding is observed. This indicates that the minimum depth of the skin removal is: A epidermis B dermis C subcutaneous tissue D muscle tissue Tags: Skin |

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Q: An individual is in a car accident during which he has burns over several areas of his body. These burns have affected mainly the epidermal tissues. Which of the following would not be expected in these areas of burn? A higher propensity for infection B change in skin color C increased loss of fluids to the environment D inability to sweat Tags: Skin |

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Q: Which of the following does NOT serve as a function of skin? A immune system activation B protection against dehydration C vitamin D production D releasing hormones that affect hepatocyte proliferation Tags: Skin |

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Q: Which of the following problems would not be expected to take place in a severe chemical burn of the skin? A change in pigmentation of the skin B increased risk of infection C decreased ability to thermoregulate D decreased fluid loss to the environment Tags: Skin |

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