29 Questions
What is the main function of the submucosa in the alimentary system?
Provides limited mobility of lamina propria against underlying tissues
What type of cells are present in both types of oral mucosa and are capable of rapid renewal?
Langerhans cells
Which type of oral mucosa is exposed to mechanical loads and has a keratinized epithelium?
Masticatory mucosa
Which component of tooth structure is described as having 96% minerals, mainly hydroxyapatite crystals?
Tooth enamel
What is the main function of cellular cementum in a tooth root?
House cell bodies and processes of cementocytes
Which structure is described as having thin canaliculi containing processes of odontoblasts and unmyelinated nerve fibers?
Dentin
Which type of taste receptor is responsible for detecting umami?
T1R1+T1R3
Which ion is NOT typically found in saliva?
Mg+
In which type of cell are dark secretory granules typically found?
Serous secretory cells
Which component of saliva is responsible for antibacterial and defense functions?
Lysozyme
Which gland is composed of secretory portions known as serous acini and mucous tubules?
Major salivary glands
Which type of cells secrete almost all proteins in saliva?
Serous cells
What is the main function of Von Ebner's glands under the circumvallate papillae?
Produce lipase for digesting lipids
Which type of cells are the Type 1, Type 2, and Type 3 cells in the taste buds?
Gustatory cells
What characteristic defines filiform papillae on the tongue?
Nonkeratinized, pointed, and no taste buds
How do foliate papillae differ between childhood and adulthood?
They have more taste buds in childhood
Which part of the tongue is mainly responsible for manipulating food due to its rough surface?
Mechanical papillae
What is the main function of Taste pores in the gustatory cells?
Detect presence of specific chemicals
What is the main function of the intercalated duct in salivary glands?
Exchange of Cl- for HCO3-
Which gland has predominantly mucous tubules with poorly developed serous demilunes?
Sublingual gland
What is the origin of mucous secretion in salivary glands?
From primordial serous acinus
Which type of ducts are mainly responsible for determining the final composition of saliva?
Intercalated and striated ducts
What is a characteristic feature of the principal duct in salivary glands?
Simple columnar epithelium
Which gland contains long intercalated ducts and clusters of adipocytes?
Parotid gland
What is the role of chemical molecules in the taste bud process?
They enter the taste pore and bind to receptors in the cell membrane.
Which type of channels are activated for sour taste in the gustatory cells?
H+-activated cationic channels
What do type 2 cells in the taste bud release during the taste bud process?
ATP via membrane transporters
Which cells release neurotransmitters from vesicles by exocytosis in the taste bud process?
Type 3 cells
How is a signal transmitted to the CNS in the taste bud process?
Through nerve terminals
Learn about the characteristics and functions of mucosa (mucous membrane) and submucosa in the alimentary system. Explore the composition of lamina propria and submucosa in different tracts such as the alimentary, urinary, and respiratory tracts.
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