A synapse is a junction between two nerve cells, or between a nerve cell and a gland or muscle. It is a specialized junction that allows a signal to pass from one cell to another. The signal is usually an electrical or chemical one, and is transmitted across the synapse when a neurotransmitter is released …
A nerve impulse is a wave of electrical activity that travels along the length of a nerve cell. It is generated by the movement of ions across the nerve cell membrane and is the main method of communication between nerve cells. The nerve impulse begins when a stimulus, such as a touch or a sound, …
When ions are stimulated, their charges may change. For example, when an atom gains or loses electrons, its charge changes. If an atom gains electrons, it becomes more negatively charged and if it loses electrons, it becomes more positively charged.
The charges on either side of the plasma membrane are defined by the distribution of ions across the membrane. These ions include sodium, potassium, chloride, and other small molecules. The inside of the cell is typically more negative than the outside due to the presence of anionic proteins and other negatively-charged molecules, while the outside …
1. Insulation: Myelin sheaths insulate nerve fibres, allowing them to transmit nerve impulses quickly and efficiently. 2. Support: Myelin sheaths also provide physical support to the nerve fibres they surround, protecting them from damage. 3. Maintenance: Myelin sheaths are responsible for maintaining the structural integrity of the axon. 4. Metabolic support: Myelin sheaths provide metabolic …
Functions of myelin sheath – മൈലിൻ ഷീറ്റിന്റെ പ്രവർത്തനങ്ങൾ Read More »
Grey matter is the part of the brain that contains most of the nerve cells (neurons). It is located in the central nervous system and is responsible for processing information. White matter is the part of the brain that contains nerve fibres and myelinated axons, which are responsible for carrying information from one part of …
Grey matter, white matter – ഗ്രേമാറ്റർ, വൈറ്റ് മാറ്റർ Read More »
Myelin sheaths are formed by glial cells called Schwann cells. The Schwann cells wrap around the axon of a nerve cell in a spiral pattern, forming multiple layers of insulation. This insulation significantly increases the speed of electrical impulses travelling along the axon. Myelin sheaths are also found in the central nervous system, where they …
Formation of myelin sheath – മൈലിൻ ഷീറ്റിന്റെ രൂപീകരണം Read More »
A synaptic knob is a small protuberance that forms on the end of a neuron when it is stimulated. Synaptic knobs allow the neuron to communicate with other neurons by releasing neurotransmitter molecules. These molecules help to create an electrical signal that sends information from one neuron to the next. Synaptic knobs are an essential …
Axonites are molecules found in the axons of neurons, which are the long, thin fibres that transmit electrical signals from one neuron to another. They are thought to be involved in the development, maintenance, and transmission of electrical signals in the nervous system. They are also involved in the formation of synaptic connections between neurons. …
Axons are long, slender projections of a neuron that act as an electrical conductor, transferring signals from the neuron to other cells. They are typically covered by a fatty sheath known as the myelin sheath, which helps to insulate and increase the speed of the electrical signal. Axons can be several feet in length, and …