Which statement accurately reflects the nature of endogenous rhythms?

Which of the following processes is an example of a circadian rhythm in humans?

Which gland's activity is influenced by the structure controlling circadian rhythms, leading to the regulation of sleep patterns?

What is a common feature of stage 2 NREM (non-rapid eye movement) sleep?

Lucas has been asleep for a short while when he suddenly starts to show signs of intense brain activity on the EEG, similar to when he is awake. Additionally, his eyes are moving rapidly, but his body does not move. What phase of sleep is Lucas most likely in?

Following several weeks of working double shifts, Emma has started to notice she is more irritable and has a harder time remembering details. Which of the following is a likely consequence of her sleep deprivation?

Linda often finds herself waking up on the floor with bruises, having no recollection of how she got there. Her partner reports that Linda seems to be fighting or fleeing from something in her sleep, but she doesn't remember her dreams. Which condition is Linda most likely experiencing?