The following points highlight the three main components of a Neuron. The components are: 1. Perikaryon 2. Axon 3. Myelin Sheath and Myelinogenesis. Neuron: Components # 1. Perikaryon: (a) Its diameter varies from 5µ to 125µ. (b) It has a cell membrane, cytoplasm, a large vesicular nucleus containing a single prominent nucleolus, numerous rod-like or spherical mitochondria, and a Golgi [...]
The following points highlight the five major types of neuropsychiatric disorder. The types are: 1. Myasthenia Gravis at the Neuromuscular Junction 2. Huntington's Disease 3. Parkinson's Disease 4. Alzheimer's Disease 5. Schizophrenia. Neuropsychiatric Disorder: Type # 1. Myasthenia Gravis at the Neuromuscular Junction: a. The recurrent episodes of muscle weakness produce Myasthenia Gravis. This is improved by administration of drugs [...]
Any environmental change due to which any organism shows reaction is known as stimulus. The reaction shown by the organism is called response. The organism gets many stimuli from its environment, these are called external stimuli. The organism gets these stimuli from the other organisms or any other living things or heat, water, temperature, light and wind. Some stimuli come [...]