Circadian Rhythm Refers to

question 155

Multiple Choice

Circadian rhythm refers to

• A) the pattern of emotional ups and downs we routinely experience.
• B) a pattern of biological functioning that occurs on a roughly 24‑hour cycle.
• C) the experience of sleep apnea following a lengthy transoceanic plane flight.
• D) the cycle of four distinct stages that we experience during a normal night's sleep.

---

Definitions:

Raphe Nuclei

Clusters of neurons located in the brainstem, involved in the regulation of sleep, mood, and appetite, primarily through the release of serotonin.

Insomnia

A common sleep disorder characterized by difficulty falling asleep, staying asleep, or obtaining restorative sleep, affecting one's overall health and quality of life.

Biological Adaptation

The process through which organisms adjust to changes in their environment over time, often through genetic changes or behavior modification.

Restorative Process

Processes or activities that restore health, strength, or well-being, often in the context of recovering from physical or mental exertion.