[Campbell Biology P.1064] Which of the following statements about melatonin, as described in ... | Practice Question

Which of the following statements about melatonin, as described in the text, is FALSE?

  • A: Melatonin is primarily produced by the pineal gland.
  • B: Its secretion amount depends on the length of the night.
  • C: Increased melatonin levels during the day play a significant role in promoting wakefulness.
  • D: The suprachiasmatic nucleus (SCN) controls the release of melatonin.

Explanation

The text clearly states that 'nightly increases in the level of melatonin play a significant role in promoting sleep'. Therefore, increased melatonin during the day would promote sleep, not wakefulness. Options A, B, and D are all accurately stated in the text.