Glymphatic clearance of interstitial metabolites during slow-wave sleep depends primarily on which astrocytic channel? (Expert)
#1: Aquaporin-4
#2: Kir4.1 (inward rectifier K+ channel)
#3: EAAT2 (GLT-1 glutamate transporter)
#4: NCX (sodium-calcium exchanger)
Which brainstem nucleus contains glutamatergic neurons that trigger REM sleep muscle atonia by driving medullary inhibitory neurons to suppress spinal motor neurons? (Genius)
#1: Sublaterodorsal nucleus (SLD)
#2: Locus coeruleus
#3: Pedunculopontine tegmental nucleus
#4: Dorsal raphe nucleus
0/0 Correct
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Sleep Fun Facts
Humans spend about one-third of their lives sleeping — if you live to 75, that’s roughly 25 years spent asleep.
Obscurity Level: Basic
Octopuses have two distinct sleep states — a quiet sleep and an active “REM-like” sleep during which they twitch and rapidly change color and texture, leading scientists to speculate they may be dreaming.
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