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ADA NBDE National Board Dental Part I

Category - NBDE

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Bitter taste cells transmit taste stimuli by which of the following?

production of H+ which closes K+ channels
activating IP3 which increases intracellular Ca2+
Na+ influx through passive ion channels
activating cAMP which closes K+ channels

Explanation

Answer: B - Bitter taste cells initiate nerve conduction via second messengers. Intracellular Ca2+ levels are increased by activation of IP3 at the cell membrane receptor.

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ADA NBDE National Board Dental Part I

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ADA NBDE National Board Dental Part I

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