Knowledge Flashcards
7 cards from real NBDE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Knowledge flashcards as text
Which of the following is the correct order of tooth development stages?
Answer: Initiation, proliferation, histodifferentiation, morphodifferentiation, apposition, maturation
Tooth development proceeds in sequence: initiation → proliferation → histodifferentiation → morphodifferentiation → apposition → maturation.
The mucogingival junction can be identified by:
Answer: A color change from pink keratinized gingiva to red alveolar mucosa
The mucogingival junction is a visible line demarcating the pale pink keratinized attached gingiva from the darker, more mobile alveolar mucosa.
Nitrous oxide produces its analgesic and anxiolytic effects primarily by:
Answer: Activating opioid receptors and inhibiting NMDA receptors
Nitrous oxide analgesia is mediated through endogenous opioid release and NMDA receptor antagonism, not primarily through GABA-A receptors.
Which of the following describes a true cyst?
Answer: A pathological cavity lined by epithelium
By definition, a true cyst is a pathological cavity lined by epithelium, distinguishing it from pseudocysts which lack epithelial lining.
The resting membrane potential of a nerve cell is approximately:
Answer: -70 mV
The resting membrane potential of neurons is approximately -70 mV, maintained primarily by the Na+/K+ ATPase pump and selective membrane permeability.
Which salivary gland produces the highest proportion of mucous secretion?
Answer: Sublingual gland
The sublingual gland is primarily mucous-secreting, while the parotid is purely serous and the submandibular is mixed (predominantly serous).
Which condition is characterized by multiple dentigerous cysts, odontogenic keratocysts, and basal cell carcinomas of the skin?
Answer: Gorlin-Goltz syndrome (nevoid basal cell carcinoma syndrome)
Gorlin-Goltz syndrome is an autosomal dominant condition caused by PTCH1 mutations, featuring multiple odontogenic keratocysts, basal cell carcinomas, and skeletal anomalies.