30 Questions
What type of nerve fibers in the periodontal ligament regulate the luminal diameter of the arterioles?
Autonomic fibers
Which type of nerve fibers in the periodontal ligament mediate pain sensation?
Sensory 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?
Jaw-jerk reflex
Which type of collagenous connective tissue is found deep to the epithelium in the gingiva?
Dense irregular collagenous connective tissue
What is the principal fiber group in the gingiva that resembles those of the periodontal ligament?
Type I collagen fibers
How does the epithelium of the gingiva attach to the enamel surface near the tooth?
By hemidesmosomes
Which oral structure separates the oral cavity from the nasal cavity?
Palate
What type of epithelium covers the masticatory mucosa on the oral aspect of the hard palate?
Stratified squamous keratinized epithelium
Which epithelium covers the uvula in the oral cavity?
Stratified squamous nonkeratinized epithelium
What is responsible for the movement of the uvula?
Skeletal muscle
Which oral structure forms a robust barrier between the oral cavity and the gingival connective tissue?
Junctional epithelium
What type of tissue underlies the wet stratified squamous keratinized epithelium on the oral aspect of the hard palate?
Dense irregular collagenous connective tissue
What do odontoblasts manufacture during dentinogenesis?
Dentin
Why does dentin have the capability of self-repair?
As a result of odontoblasts remaining functional
What is thought to mediate dentin sensitivity?
Sensory nerve fibers
What causes the depolarization of nerve fibers associated with dentin sensitivity?
Disturbance of tissue fluid within dentinal tubules
What is the composition of cementum?
Mainly organic matrix with some calcium hydroxyapatite
What do odontoblasts have a close association with in the context of dentin sensitivity?
Sensory nerve fibers
What is the main function of the odontoblastic zone of the pulp?
Formation of dentin
Which zone of the pulp lacks cells and is located deep to the odontoblastic zone?
Cell-free zone
What is a characteristic feature of the cell-rich zone of the pulp?
Consists of fibroblasts and mesenchymal cells
What distinguishes the pulp core from most other loose connective tissues?
Presence of adipose cells
Which type of nerve fibers in the pulp are responsible for controlling blood vessel diameters?
Sympathetic fibers
What clinical observation indicates hemorrhage of the pulp?
Black discoloration of the tooth
What is the average lifespan of cells in the taste buds?
10 days
Which type of cells in the taste bud function as reserve cells and regenerate other cells?
Basal cells (type IV cells)
Where do nerve fibers enter the taste bud to form synaptic junctions with specific cell types?
Taste pore
What are the spindle-shaped cells in a taste bud composed of?
60-80 cells
Which epithelial cells form the taste pore that interacts with nerve fibers?
Squamous epithelial cells
What is the main function of the long, slender microvilli that protrude from the taste pore?
Taste sensation discernment
Test your knowledge on the nerves of the periodontal ligament, including autonomic fibers, pain fibers, and proprioceptive fibers. Learn about the clinical correlations related to proprioceptive fibers in the periodontal ligament.
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