The main function of Nissl bodies within neurons is to aid in the production and dispersal of chemical substances such as proteins and peptides, as illustrated by Richard F. Thompson in his book "The Brain: A Neuroscience Primer." The structure of Nissl bodies makes them particularly adept at protein synthesis, an essential cellular process within a neuron.
The structure of Nissl bodies consists of a granular and concentrated section of the endoplasmic reticulum. The Nissl substance that creates the bodies is made up of RNA, proteins, lipids and acid polysaccharides that aid in the creation of proteins. It is believed that the majority of proteins created by Nissl bodies are used intercellularly.
Since Nissl bodies are found only in the soma and dendrites of a neuron and do not appear in the axon, the proteins they create are likely carried to the axon by axontransmitters. Nissl bodies are essential to the well-being of a neuron; a decrease in the number of Nissl bodies in a neuron indicates neural degeneration.
These structures change abruptly in the case of inflammatory disease, oxygen deprivation or trauma to the nervous system. They are named after the German scientist, F. Nissl, who first developed the technique of staining and identifying the structures with methylene blue.Learn More
The function of nervous tissue is to transmit and receive external and internal stimuli. Consisting of two basic types of cells, neurons and glial cells, nervous tissue represents a fundamental aspect of living organisms and can be considered the seat of response to stimuli. Signals from the internal or external environment are received by the neurons and then transmitted as electrical impulses to muscles, glands, the central nervous system or other neurons.Full Answer >
The sensory system is responsible for detecting stimuli from the outside world and transferring nervous impulses to the correct portion of the brain or spinal column to allow the body to react. The sensory system consists of the eyes, ears, nose, tongue, skin and their associated nerves.Full Answer >
The New York University Langone Medical Center explains that brain cells begin to die after about four minutes without oxygen. Brain damage caused from a lack of oxygen is called anoxic damage, while hypoxia describes a low-oxygen condition. In other words, someone suffering from a lack of oxygen is said to be hypoxic, but any damage sustained is anoxic damage.Full Answer >
To effectively immobilize an opponent during a fight by way of pressure points, one must cause shock to certain areas of the body and cause a chain reaction that leads to a knockout. When certain vital areas of the body are hit with strong percussive force, the brain sends a "shutdown" signal to the rest of the body.Full Answer >