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Acetylcholine, a well known neurotransmitter, plays a critical synaptic role in the initial formation of memory. Chemical blockage of the acetylcholine receptors makes it harder to learn and remember even in healthy young people. Evidence for it comes from pharmacological studies conducted on human subjects wherein blockage of muscarinic cholinergic receptors by drugs such as scopolamine impaired the encoding of new memories. Conversely, drugs which activated nicotinic receptors enhanced the encoding of new information.
Similarly administration of scopolamine into the hippocampus impaired encoding of spatial memory. It has also been found that administration of drug that increases the level of acetylcholine in Alzheimer's disease (characterised of memory problems) improves memory by inhibiting the action of acetyl cholinesterase, an enzyme that breaks down acetylcholine and reduces its amount. Overall it can be said that decreased acetylcholine in the brain cause problems with memory function.
Plant sources Although there is a multitude of colours in the plant kingdom, their extraction and use in food systems is not an easy task. Unless the colourants have some outst
Attributes of Population The attributes of a population are of two basic types : i) Numerical attributes such as density, mortality (birth rate), mortality (death rate), disper
organism that have wide tolerance range
What is pollination? What are the main forms of pollination? The process in which pollen grains (the male gametophytes of phanerogamic plants) reach the female gametophyte is k
Explain the Inoculating Loops and Needles? These are most commonly used tools for inoculation. The inoculating loop consists of insulating handle at the end of which inoculatin
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Define Sugar as a type of Carbohydrates? This group includes monosaccharide and disaccharides. List down the names of sugars under both these groups and check it out with those
In this unit, you have learnt that heart is a muscular organ situated in thorax covering with pericardium and consist of four chambers i.e. right atrium, left atrium, right ventric
What is the type of egg in which yolk is absent?
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