The skin protects, but how does it protect us and from what? Describe how the epidermal dendritic cells and melanocytes protect us. Describe what these cells protect us from
What will be an ideal response
The epidermal dendritic cells act as antigen presenting cells (APC), they present part of the pathogens (fragments of pathogens called epitopes) to other immune system cells to trigger an immune response to an infection. The melanocytes produce melanin in response to exposure to cell damaging, ultraviolet light. UV light is converted to heat when it strikes melanin pigment. Unlike UV light, heat will not damage the cells particularly the DNA within the nucleus of the skin's cells.
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The first line of defense against bacterial infection from coming in contact with a contaminated surface is
a. macrophages. b. mast cells. c. the skin. d. mucous membranes. e. Langerhan cells.
What function would immediately cease if the ribosomes of a cell were destroyed?
A) Ciliary action B) Osmosis C) Exocytosis D) Active transport E) Protein synthesis
Which of the following hormones is produced in the thyroid gland?
A) PTH or B) calcitonin
Which of the following is NOT a major constituent of bile?
A. Urea B. Lecithin C. Bilirubin D. Cholesterol