Multiple choice

A circadian rhythm is a 24 hour cycle in the physiological processes of all the living organisms. Which of the following hypothalamic nuclei is most important for encoding the set point for this daily circadian rhythms?

  1. Supraoptic nucleus

  2. Arcuate nucleus

  3. Pretectal nucleus

  4. Paraventricular nucleus

  5. Suprachiasmatic nucleus

Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

The suprachiasmatic nucleus is a group of brain cells located in the hypothalamus. It regulates the circadian cycles and also influences many physiological and behavioural rhythms occurring over a 24-hour period, such as the sleep/wake cycle.