Question

which of these is a characteristic of sleep? select all that apply. - immobility - rapidly reversible - regulated by homeostatic and circadian rhythms - only regulated by circadian rhythms - only regulated by ultradian rhythms

Explanation:

• Immobility: During sleep, the body generally has reduced movement, though there can be some minor adjustments.
• Rapidly reversible: Sleep is a state that can be relatively quickly exited (e.g., waking up).
• Regulated by homeostatic and circadian rhythms: Homeostatic regulation (e.g., the longer one is awake, the stronger the drive to sleep) and circadian rhythms (the internal body clock that influences sleep - wake cycles) both play roles in sleep.
• "Only regulated by circadian rhythms" is incorrect as homeostatic factors also regulate sleep.
• "Only regulated by ultradian rhythms" is incorrect. Ultradian rhythms (cycles shorter than a day, like the sleep cycle within a night) are part of sleep but sleep is also regulated by longer - term (circadian) and homeostatic factors.

Answer:

Immobility, Rapidly reversible, Regulated by homeostatic and circadian rhythms.