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In addition, undergraduate students begin their M. A very extreme example of second messenger amplification is seen in the dark-adapted frog retina, where a single photon can form a single bleached rhodopsin molecule, which can activate 37,000 molecules of G-protein. Thus, 24 hr of sleep loss in rats may result in higher levels of accumulated sleep propensity than 36–40 hr of sleep loss in humans, producing more sleep drive toward the end of the sleep deprivation period and thus a greater tendency toward brief NREM sleep episodes, microsleeps, and NREM sleep-like neuronal activity in waking.

Pages: 556

Publisher: Nottingham University Press; 1 edition (March 1, 2007)

ISBN: 1904761437

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