Neurotransmitter - Function Of Neurotransmitters, Characteristics Of Neurotransmitters, Neurotransmitters And Disease, Neurotransmitters And Drugs, Neurotransmitters' Role In Memory And Learning
cells affects information
Neurotransmitters are chemical agents secreted at the end of axons of nerve cells that diffuse across the synaptic gap and transmit information to adjoining cells such as neurons, muscle cells, and glands, by altering their electrical state or activity. There are many neurotransmitters with a variety of structures and functions; two of the principle ones are acetylcholine and norepinephrine. Since the neurotransmitters convey information, anything that affects their behavior affects the function of the organism.
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The neurotransmitters are stored in tiny sac-like structures called vesicles at the end of axons. When an impulse, or nerve signal, reaches the end of the axon, the vesicles release a neurotransmitter into the small space between the adjoining cells (synaptic gap). Neurotransmitters diffuse across the synapse and bind to receptors in the receiving cell that are specific for the neurotransmitter. T…
The number of known neurotransmitters has increased tremendously over the past several years. One of the earliest ones studied was acetylcholine, the most common neurotransmitter found in both invertebrates and vertebrates. It is the stimulating agent for skeletal muscle cells, but is the inhibiting agent for heart muscle cells, which demonstrates that the action of a neurotransmitter is influence…
Interest in the neurotransmitter is based on evidence that knowledge of how they function provides insight into the cause of some diseases, the effects of certain substances, and the behavior of organisms. Myasthenia gravis, which is a disease characterized by weakness of muscles and fatigue, is caused by a disturbance in the action of acetylcholine on skeletal muscles and is now treated by drugs …
The rise of drug addiction has directed attention to the role of neurotransmitters by attempting to understand how it happens and how it can be counteracted. Cocaine and crack are psychostimulants that affect neurons containing dopamine in the limbic and frontal cortex of the brain; when they are used they generate a feelings of confidence and power. However, when large amounts are taken, people &…
One of the most exciting areas of research is the attempt to find out how learning and memory take place. One of the earliest researchers who attempted to explain learning and memory as a function of cellular change was the Canadian psychologist, Donald O. Hebb. He maintained that repeated firing of axons results in metabolic changes in the presynaptic and post synaptic neurons. In other words, le…
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User Comments
about 1 month ago
ALICE TOLUHI
it is a good work.promise to contribute.cheers
3 months ago
bala
send something about neurotransmitters