Periodontal Ligament Nerves Quiz
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Questions and Answers

What type of nerve fibers in the periodontal ligament regulate the luminal diameter of the arterioles?

  • Somatic fibers
  • Autonomic fibers (correct)
  • Proprioceptive fibers
  • Sensory fibers
  • Which type of nerve fibers in the periodontal ligament mediate pain sensation?

  • Sensory fibers (correct)
  • Sympathetic fibers
  • Proprioceptive fibers
  • Motor fibers
  • What reflex is initiated by proprioceptive fibers in the periodontal ligament, causing an involuntary opening of the jaw when biting down on something hard?

  • Knee-jerk reflex
  • Startle reflex
  • Jaw-jerk reflex (correct)
  • Blink reflex
  • Which type of collagenous connective tissue is found deep to the epithelium in the gingiva?

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

    What is the principal fiber group in the gingiva that resembles those of the periodontal ligament?

    <p>Type I collagen fibers</p> Signup and view all the answers

    How does the epithelium of the gingiva attach to the enamel surface near the tooth?

    <p>By hemidesmosomes</p> Signup and view all the answers

    Which oral structure separates the oral cavity from the nasal cavity?

    <p>Palate</p> Signup and view all the answers

    What type of epithelium covers the masticatory mucosa on the oral aspect of the hard palate?

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

    Which epithelium covers the uvula in the oral cavity?

    <p>Stratified squamous nonkeratinized epithelium</p> Signup and view all the answers

    What is responsible for the movement of the uvula?

    <p>Skeletal muscle</p> Signup and view all the answers

    Which oral structure forms a robust barrier between the oral cavity and the gingival connective tissue?

    <p>Junctional epithelium</p> Signup and view all the answers

    What type of tissue underlies the wet stratified squamous keratinized epithelium on the oral aspect of the hard palate?

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

    What do odontoblasts manufacture during dentinogenesis?

    <p>Dentin</p> Signup and view all the answers

    Why does dentin have the capability of self-repair?

    <p>As a result of odontoblasts remaining functional</p> Signup and view all the answers

    What is thought to mediate dentin sensitivity?

    <p>Sensory nerve fibers</p> Signup and view all the answers

    What causes the depolarization of nerve fibers associated with dentin sensitivity?

    <p>Disturbance of tissue fluid within dentinal tubules</p> Signup and view all the answers

    What is the composition of cementum?

    <p>Mainly organic matrix with some calcium hydroxyapatite</p> Signup and view all the answers

    What do odontoblasts have a close association with in the context of dentin sensitivity?

    <p>Sensory nerve fibers</p> Signup and view all the answers

    What is the main function of the odontoblastic zone of the pulp?

    <p>Formation of dentin</p> Signup and view all the answers

    Which zone of the pulp lacks cells and is located deep to the odontoblastic zone?

    <p>Cell-free zone</p> Signup and view all the answers

    What is a characteristic feature of the cell-rich zone of the pulp?

    <p>Consists of fibroblasts and mesenchymal cells</p> Signup and view all the answers

    What distinguishes the pulp core from most other loose connective tissues?

    <p>Presence of adipose cells</p> Signup and view all the answers

    Which type of nerve fibers in the pulp are responsible for controlling blood vessel diameters?

    <p>Sympathetic fibers</p> Signup and view all the answers

    What clinical observation indicates hemorrhage of the pulp?

    <p>Black discoloration of the tooth</p> Signup and view all the answers

    What is the average lifespan of cells in the taste buds?

    <p>10 days</p> Signup and view all the answers

    Which type of cells in the taste bud function as reserve cells and regenerate other cells?

    <p>Basal cells (type IV cells)</p> Signup and view all the answers

    Where do nerve fibers enter the taste bud to form synaptic junctions with specific cell types?

    <p>Taste pore</p> Signup and view all the answers

    What are the spindle-shaped cells in a taste bud composed of?

    <p>60-80 cells</p> Signup and view all the answers

    Which epithelial cells form the taste pore that interacts with nerve fibers?

    <p>Squamous epithelial cells</p> Signup and view all the answers

    What is the main function of the long, slender microvilli that protrude from the taste pore?

    <p>Taste sensation discernment</p> Signup and view all the answers

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