Properties and functions of synapses, Biology

Properties and Functions of Synapses

There is an interval between depolarisation of the presynaptic terminal and the earliest appearance of a postsynaptic response. This interval is called synaptic delay. The synapse is the prime locus in the integration of neuronal signals. The synapse is also a site where functional properties are changed as a result of previous activity. For example, prolonged activity transmitted across a synaptic junction may result in a reduction of the threshold of firing of the neurons to further afferent inputs. This indicates that synapses are the site of changes in the storage of information (learning and memory).

The synapse is thus modifiable i.e., it shows plasticity. A variety of chemical agents (drugs etc.) act at synapses to alter nervous system's behaviour. A postsynaptic neuron is an integrator of information that is received from presynaptic neurons. Synaptic transmission is a one way process except in electric synapses. Synapses are the site of several pathological disorders viz., Parkinsonism, myasthenia gravis, and psychiatric disorders like schizophrenia. So far we have discussed the action potential and its effect at the synapse i.e. release of neurotransmitter. Acetylcholine is just one of the examples of a neurotransmitter. There are many more physiologically active chemicals that are produced by nerve cells.

Posted Date: 1/17/2013 12:57:52 AM | Location : United States

Related Discussions:- Properties and functions of synapses, Assignment Help, Ask Question on Properties and functions of synapses, Get Answer, Expert's Help, Properties and functions of synapses Discussions

Write discussion on Properties and functions of synapses
Your posts are moderated
Related Questions
Explain the working of Skeletal Muscle? Skeletal muscle is under voluntary control and is responsible for voluntary movements of body parts. Skeletal muscle is also called stri

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Explain the following terms in detail - Homology, Homologous ? Structures that have a similar evolutionary origin however different functions. The wing of a bat and a whale's fl

Meat products Meat is an important commodity in the diet of people in view of its complimentary role in balancing the diet with rich source of amino acids, vitamins and mineral

What is Bile salts Bile salts have a considerable ability to lower surface tension. By  this property, they prevent  the coming together of the small fat droplets in  the  in

The symptoms and signs of endocarditis are often constitutional and, when localized, often result from a complication of IE rather than reflect the intracardiac infection itself. C

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Describe about the Lysosomes enzymes Within the cytoplasm of the cell, several hydrolytic enzymes (lytic enzymes) capable of hydrolysing proteins, nucleic acids and carbohydra

Glycogen is a multibranched polysaccharide which serves as a part of energy storage in fungi and animals. In humans the glycogen is recognized and stored primarily in the cells of

Making leaf collections Collect young leaves of as many varieties of plants as possible. Place various layers of news- paper or blotting paper on a firm, smooth board. Next org