Integumentary System: Skin Layers and Appendages
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Questions and Answers

What is the primary function of the skin?

  • Aiding in muscle movement
  • Protecting the body from the environment (correct)
  • Regulating blood sugar levels
  • Assisting in digestion

Which of the following is NOT a component of the skin?

  • Vitamins (correct)
  • Protein
  • Fats
  • Water

How many nerve endings are present in one inch of skin?

  • 1,000 (correct)
  • 100,000
  • 10,000
  • 100

What is the approximate percentage of total body weight that the skin typically accounts for?

<p>15% to 20% (D)</p> Signup and view all the answers

Which layer of the skin acts as an insulator for maintaining body temperature?

<p>Subcutaneous tissue (A)</p> Signup and view all the answers

What is the purpose of the skin appendages?

<p>To perform sensory functions and thermoregulation (D)</p> Signup and view all the answers

What is the main function of the epidermis in the skin?

<p>Makes new skin cells and provides a protective barrier (A)</p> Signup and view all the answers

Which protein is primarily responsible for forming the layers of the skin?

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

What is the main function of the dermis in the skin?

<p>Supplies blood and keeps the skin in touch with the environment (D)</p> Signup and view all the answers

Which layer of the skin is also known as the subcutaneous layer?

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

What type of epithelium is the epidermis composed of?

<p>Stratified squamous keratinized epithelium (B)</p> Signup and view all the answers

Which of the following does NOT describe a characteristic of the dermis?

<p>Production of sweat by sweat glands (B)</p> Signup and view all the answers

What type of sensory receptor responds to pressure or vibration?

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

Where are Meissner Corpuscles located?

<p>Dermal papillae (A)</p> Signup and view all the answers

What is the specific function of Pacinian Corpuscles in the skin?

<p>Sensitivity to vibration and pressure (D)</p> Signup and view all the answers

Which part of the body is NOT covered by hair?

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

What does the hypodermis consist of?

<p>Loose connective tissue (D)</p> Signup and view all the answers

What is the main function of the superficial fascia?

<p>Binds the skin loosely to adjacent organs (B)</p> Signup and view all the answers

Which layer of the skin is described as the thick outermost layer of dead cells devoid of nuclei and organelles?

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

What is the primary type of cell found in the epidermis, constituting 90% of epidermal skin cells?

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

Which cell type is responsible for the production of melanin pigment in the skin?

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

Which layer of the skin is described as a highly refractive zone seen only in very thick skin?

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

Where are Langerhans cells located in the skin?

<p>Reticular Layer (A)</p> Signup and view all the answers

What is the function of dermal papillae in the skin?

<p>To increase adhesion between the epidermis and dermis (D)</p> Signup and view all the answers

What is the function of the hair papilla?

<p>Provides a capillary network to sustain the hair follicle (C)</p> Signup and view all the answers

Which part of the nail is considered the hidden part of the nail?

<p>Nail root (A)</p> Signup and view all the answers

What covers the nail root of a nail?

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

Where are the matrix, medulla, and cortex located in a hair?

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

Which part of the hair covers the hair papilla?

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

What is the main component of nails?

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

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