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What purpose does sleep serve for the brain?
A. We don't yet know full answer to this fundamental question however neuroscience is providing intriguing clues. It's increasingly clear that adequate sleep is necessary to consolidate certain types of memories and to improve performance on different learning tasks. If we are deprived of sleep, we don't learn as well. Recent brain research indicates that so-called "slow-wave" sleep, a type of non-REM sleep which generally occurs early in the night, is specifically crucial to learning. Sleeping within 30 hours of new learning seems to be essential, however some studies suggest that brief, 60- to 90-minute naps produce as much improvement in practiced behaviors as a full eight hours of sleep, so long as naps include both slow-wave and REM sleep.
Anyone who has ever pulled an all-nighter knows that lack of sleep can impair learning, memory, attention and decision-making, making it difficult to perform even simple tasks. Our risk of accidents is also greater when we don't sleep well. While average person requires about 8 hours of sleep per night, surveys suggest that America is sleep-deprived. As many as one-fifth of us say daytime sleepiness keeps us from performing at our peak, and nearly as many report having fallen asleep during driving. Chronic lack of sleep or abrupt changes in sleep patterns could signal an underlying problem that warrants evaluation by a qualified sleep doctor.
Sporotrichosis Sporotrichosis is subacute or chronic infectious disease caused by a dimorphic fungus, Sporothrix schenkii which occurs commonly in soil, wood and vegetation. T
PLASMODESMATA Termed by Tangl & Strasburger. Cytoplasmic / Protoplasmic bridges between 2 adjacent cells. Desmotubules connects the E.R. of 2 cells. Plasmodesmata p
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Defence mechanisms of the host The healthy animal is protected from pathogenic organisms present in the environment by virtue of the effective immune mechanism present from bi
1. A man with normal pigment, whose father was an albino, marries an albino. What chance is there that their first child will be an albino? 2. A man with normal pigment marries
MECHANISM OF URINE FORMATION - Production of urine is uripoisis or diuresis. First of all it was explained by Kushney. Nephron separates acidic urine from basic blood, so ma
What is the essential condition for a protein to be identical to another protein? For a protein to be identical to another protein it is essential for the sequence of amino aci
Plaque Assessment Microbial films have been known to form on inert biomaterial surfaces in an aqueous environment. Implants placed in the oral cavity are no exception and repre
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Ordinary osmosis cannot be used to purify water. If the applied pressure exceeds osmotic pressure then water starts moving from solution side to pure solvent side. This is reverse
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