Examlex
One role of pit membranes in tracheids is to:
Circadian Rhythms
Biological processes that display an endogenous, entrainable oscillation of about 24 hours, regulating sleep-wake cycles among other bodily functions.
Neurological Disorders
A broad category of conditions that affect the nervous system, including the brain, spinal cord, and nerves, leading to various symptoms and disabilities.
Melatonin
A hormone produced by the pineal gland that regulates sleep and wakefulness.
Hidden Observer
A theoretical part of the mind proposed by Ernest Hilgard to explain hypnotic phenomena, suggesting a part of the mind remains aware and observant during hypnosis.
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