Body rhythms and circadian Practice Questions
20 free Body rhythms and circadian practice questions for the Physiology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.
Questions
20 questions
All Body rhythms and circadian questions
- Q1. Which structure serves as the primary biological clock regulating circadian rhythms in humans?
- Q2. The normal duration of the human circadian rhythm under constant environmental conditions is closest to:
- Q3. Light influences circadian rhythm primarily through which pathway?
- Q4. Melatonin secretion from the pineal gland is highest during:
- Q5. Which hormone shows a pronounced circadian rhythm with peak levels in the early morning?
- Q6. The term 'zeitgeber' refers to:
- Q7. Which physiological variable normally shows a circadian rhythm with a peak in the late afternoon?
- Q8. Jet lag occurs primarily due to:
- Q9. Which gene family plays a crucial role in generating molecular circadian rhythms?
- Q10. Growth hormone secretion is most closely associated with which sleep stage?
- Q11. Which circadian rhythm disturbance is commonly seen in night-shift workers?
- Q12. The pineal gland receives neural signals related to light exposure primarily from the:
- Q13. Which physiological rhythm has a period shorter than 24 hours?
- Q14. The sleep–wake cycle is best classified as a:
- Q15. Which factor is most effective in resetting the circadian clock?
- Q16. A free-running circadian rhythm is most likely to occur in:
- Q17. Which neurotransmitter is involved in transmitting light signals from the retina to the circadian clock?
- Q18. Which circadian change contributes to increased alertness during daytime?
- Q19. Seasonal affective disorder is primarily associated with alterations in:
- Q20. Which statement best describes circadian rhythms?