Mucosa and Submucosa in Alimentary System
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Questions and Answers

What is the main function of the submucosa in the alimentary system?

  • Contains enamel rods
  • Production of saliva
  • Forms the hard palate
  • Provides limited mobility of lamina propria against underlying tissues (correct)
  • What type of cells are present in both types of oral mucosa and are capable of rapid renewal?

  • Odontoblasts
  • Merkel cells
  • Melanocytes
  • Langerhans cells (correct)
  • Which type of oral mucosa is exposed to mechanical loads and has a keratinized epithelium?

  • Palatine glands
  • Masticatory mucosa (correct)
  • Lining mucosa
  • Buccal glands
  • Which component of tooth structure is described as having 96% minerals, mainly hydroxyapatite crystals?

    <p>Tooth enamel</p> Signup and view all the answers

    What is the main function of cellular cementum in a tooth root?

    <p>House cell bodies and processes of cementocytes</p> Signup and view all the answers

    Which structure is described as having thin canaliculi containing processes of odontoblasts and unmyelinated nerve fibers?

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

    Which type of taste receptor is responsible for detecting umami?

    <p>T1R1+T1R3</p> Signup and view all the answers

    Which ion is NOT typically found in saliva?

    <p>Mg+</p> Signup and view all the answers

    In which type of cell are dark secretory granules typically found?

    <p>Serous secretory cells</p> Signup and view all the answers

    Which component of saliva is responsible for antibacterial and defense functions?

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

    Which gland is composed of secretory portions known as serous acini and mucous tubules?

    <p>Major salivary glands</p> Signup and view all the answers

    Which type of cells secrete almost all proteins in saliva?

    <p>Serous cells</p> Signup and view all the answers

    What is the main function of Von Ebner's glands under the circumvallate papillae?

    <p>Produce lipase for digesting lipids</p> Signup and view all the answers

    Which type of cells are the Type 1, Type 2, and Type 3 cells in the taste buds?

    <p>Gustatory cells</p> Signup and view all the answers

    What characteristic defines filiform papillae on the tongue?

    <p>Nonkeratinized, pointed, and no taste buds</p> Signup and view all the answers

    How do foliate papillae differ between childhood and adulthood?

    <p>They have more taste buds in childhood</p> Signup and view all the answers

    Which part of the tongue is mainly responsible for manipulating food due to its rough surface?

    <p>Mechanical papillae</p> Signup and view all the answers

    What is the main function of Taste pores in the gustatory cells?

    <p>Detect presence of specific chemicals</p> Signup and view all the answers

    What is the main function of the intercalated duct in salivary glands?

    <p>Exchange of Cl- for HCO3-</p> Signup and view all the answers

    Which gland has predominantly mucous tubules with poorly developed serous demilunes?

    <p>Sublingual gland</p> Signup and view all the answers

    What is the origin of mucous secretion in salivary glands?

    <p>From primordial serous acinus</p> Signup and view all the answers

    Which type of ducts are mainly responsible for determining the final composition of saliva?

    <p>Intercalated and striated ducts</p> Signup and view all the answers

    What is a characteristic feature of the principal duct in salivary glands?

    <p>Simple columnar epithelium</p> Signup and view all the answers

    Which gland contains long intercalated ducts and clusters of adipocytes?

    <p>Parotid gland</p> Signup and view all the answers

    What is the role of chemical molecules in the taste bud process?

    <p>They enter the taste pore and bind to receptors in the cell membrane.</p> Signup and view all the answers

    Which type of channels are activated for sour taste in the gustatory cells?

    <p>H+-activated cationic channels</p> Signup and view all the answers

    What do type 2 cells in the taste bud release during the taste bud process?

    <p>ATP via membrane transporters</p> Signup and view all the answers

    Which cells release neurotransmitters from vesicles by exocytosis in the taste bud process?

    <p>Type 3 cells</p> Signup and view all the answers

    How is a signal transmitted to the CNS in the taste bud process?

    <p>Through nerve terminals</p> Signup and view all the answers

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