Epidermis Structure and Function
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Questions and Answers

What is the function of melanin in the skin?

  • To regulate the growth of hair follicles
  • To strengthen the skin's natural barrier against friction
  • To facilitate nutrient exchange between the epidermis and dermis
  • To protect the skin from the harmful effects of ultraviolet light (correct)

What is the primary site of keratinocyte formation in the skin?

  • Stratum lucidum
  • Stratum granulosum
  • Stratum corneum
  • Stratum basale (correct)

What is the proportion of melanocytes in the stratum basale?

  • One in every ten cells
  • One in every six cells (correct)
  • One in every three cells
  • One in every twenty cells

What is the relationship between melanin production and skin color?

<p>The more melanin produced, the darker the skin (A)</p> Signup and view all the answers

What is the function of the projections of melanocytes?

<p>To transfer melanin granules to keratinocytes (D)</p> Signup and view all the answers

Which of the following layers is responsible for shedding dead keratinocytes?

<p>Stratum corneum (B)</p> Signup and view all the answers

What is the primary function of Langerhans cells in the epidermal layer?

<p>To function in the immune response (B)</p> Signup and view all the answers

Which type of heat transfer involves the transfer of heat between a warmer object and a cooler one without any direct contact?

<p>Radiation (C)</p> Signup and view all the answers

What is the term for the process of cell division where the parent cell replicates to produce two daughter cells that are genetically identical to the parent?

<p>Mitosis (D)</p> Signup and view all the answers

What is the layer of tissue that attaches the skin to underlying bone and muscle?

<p>Hypodermis (B)</p> Signup and view all the answers

What type of cells are responsible for producing melanin, the pigment responsible for skin color?

<p>Melanocytes (B)</p> Signup and view all the answers

What is the term for the proteinaceous fibers found in epithelial cells that provide structural support?

<p>Tonofilaments (B)</p> Signup and view all the answers

What is the primary source of food for house dust mites that trigger asthma in susceptible individuals?

<p>Dead skin cells (A)</p> Signup and view all the answers

What is the outermost layer of the skin that is at risk of considerable wear and tear?

<p>Stratum corneum (D)</p> Signup and view all the answers

What is the result of constant friction on a part of the skin?

<p>Callus formation (A)</p> Signup and view all the answers

What is the function of rete ridges in the skin?

<p>To anchor the dermis to the epidermis (D)</p> Signup and view all the answers

What is the result of shearing forces or friction on the skin layers?

<p>Blister formation (A)</p> Signup and view all the answers

What is the layer of the skin that contains lymph vessels, nerve endings, hair follicles, and glands?

<p>Dermis (D)</p> Signup and view all the answers

What percentage of your physical weight is made up of your skin?

<p>16% (A)</p> Signup and view all the answers

What would be the approximate area of your skin if it were laid out flat?

<p>1.7 square meters (C)</p> Signup and view all the answers

What is the name of the system that the skin is a part of?

<p>Integumentary system (C)</p> Signup and view all the answers

What type of professionals are involved in creating TED-Ed Animations?

<p>Educators and animators (A)</p> Signup and view all the answers

What can educators or animators interested in creating a TED-Ed Animation do?

<p>Nominate themselves (C)</p> Signup and view all the answers

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