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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.
Define Nutrition and Sports - Physical Fitness of an athlete? The physical fitness and performance of an athlete is affected by both current and previous nutritional status. T
Cell structure and function All organisms, whether simple or complex, plants or animals. are composed of cells. For example, a bacterium or an amoeba is made up of just one cel
VASCULA R TISSUES (= FLUID TISSUES) - The vascular tissues are of two types: blood and lymph.
ARTIFICIA L SELECTION - Man selects the individuals having the desired traits and separates them from those, which do not possess such characters. The selected ones are
Reducing Pollution - Conservation of wildlife As you already know, pollution of various kinds has affected the survival of living beings, particularly the wildlife in various
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why protozoass dont have vaccines esp. plasmodiums
Q. What are the three major cell types that form the osseous tissue? What are their functions? The three major cell types of the osseous tissue are the osteocytes, the osteobla
Some species of plant are strongly adapted to pollination by certain insects. Characteristics which are regarded as adaptations to pollination by bees are: ( a) white o
What is a pH meter? A pH meter is a device used for measuring. pH of any unknown solution. It is composed of: a) A reference electrode b) Glass electrode whose potential
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