Digestive System: Salivary Glands

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Questions and Answers

What is the orientation of fiber in the inner layer of the esophagus?

  • Spiral
  • Longitudinal
  • Circular (correct)
  • Oblique

Which nervous system is responsible for the innervation of the alimentary canal?

  • Somatic nervous system
  • Enteric nervous system (correct)
  • Peripheral nervous system
  • Central nervous system

What is the function of the esophageal glands?

  • To absorb nutrients
  • To produce digestive enzymes
  • To lubricate and protect the mucosa (correct)
  • To produce hormones

What type of epithelial lining is present in the esophageal mucosa?

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

What is the composition of the muscularis externa in the upper third of the esophagus?

<p>Bundles of skeletal muscle fibers (C)</p> Signup and view all the answers

What is the composition of the muscularis externa in the lower third of the esophagus?

<p>Only smooth muscle fibers (A)</p> Signup and view all the answers

What is the function of the esophagus?

<p>To transport swallowed material from the pharynx to the stomach (C)</p> Signup and view all the answers

What is the type of connective tissue that covers the short segment of the esophagus below the diaphragm?

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

What is the location of the neurons that innervate the alimentary canal?

<p>In Meissner and Auerbach plexuses (D)</p> Signup and view all the answers

What is the name of the layer that covers the short segment of the esophagus below the diaphragm?

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

What type of epithelium is present in the vermilion zone of the lips?

<p>Thin stratified squamous lightly keratinized epithelium (D)</p> Signup and view all the answers

What type of muscle is found in the core of the lips?

<p>Striated muscle (A)</p> Signup and view all the answers

What is the function of the minor labial salivary glands?

<p>To produce mucous for lubrication (D)</p> Signup and view all the answers

What is the structure that covers the short segment of the tongue?

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

What is the characteristic of the dermis in the vermilion zone?

<p>Rich in sensory innervation and blood capillaries (C)</p> Signup and view all the answers

What type of epithelium is present in the oral mucosa of the lips?

<p>Wet stratified squamous non-keratinized epithelium (A)</p> Signup and view all the answers

What is the function of the deep dermal papillae in the vermilion zone?

<p>To increase sensation and blood flow (A)</p> Signup and view all the answers

What is the characteristic of the connective tissue core of the lips?

<p>Dense irregular collagenous connective tissue (B)</p> Signup and view all the answers

What type of glands are present near the inner surface of the lips?

<p>Minor labial salivary glands (D)</p> Signup and view all the answers

What is the composition of the tongue?

<p>A mass of striated muscle covered by a mucous membrane (A)</p> Signup and view all the answers

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