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Types of Axons
Axons are of two types
In the case of myelinated axons the neurilemma is ensheathed by another covering, the myelin sheath, composed of complex lipoproteins. The terminal branches, dendrites, cell body (perikaryon) and the initial region of the axon (the axon hillock) are devoid of myelin sheath: Although the dendrites are relatively short, unsheathed, tapering, irregular in diameter, and branched in a wide array of patterns, the cell body cytoplasm extends into them. The dendrites receive synaptic endings over much of their surface and thus constitute the receptive surface of the neuron. They are like receiving antennae as a nerve cell receives messages along the dendrites but sends messages along the axon.
Q. Food borne infections? Food borne infections, as you may recall reading earlier, are caused by the ingestion of pathogenic microorganisms that penetrate the intestinal muco
Epidemiological studies The use of available data from the positive epidemiological studies in the risk assessment is encouraged. Data derived fiom human clinical studies, s
Etiology The causes of diarrhoea can be classified as follows: i) Infectious causes Viral : Rota virus, Norwalk and allied viruses, Enterovirus, Influenza virus,
Q. Generally where is the sporophyte positioned in relation to the gametophyte in bryophytes? How does the sporophyte obtain nutrients? The bryophyte sporophyte generally is a
Define the Indicators of Nutrition? We will begin our study on this topic by first understanding what we mean by an indicator. An indicator is a "specific and measurable statis
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Define Physiologic Functions of Iodine? Thyroid hormone performs multiple functions as regulator of cell activity and growth. The hormone has crucial metabolic roles in the foe
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Explain Transport proteins in plasma Transport proteins, embedded in lipid membranes, facilitate the import of nutrients into cells or the release of toxic products into the
Determine the fate of manganese which is absorbed? Let us now study the fate of Mn which is absorbed. After absorption, Mn is complexed with albumin and transported to the l
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