The myelin sheath is the protective layer, which is present in the outer layer of the neural cells. This myelin sheath prevents the loss of electrical impulses, which are being conducted in the neurons. This also act as an insulator between neuron and its external environment.
This layer is mainly made up of the protein and fatty substance. The degeneration of the myelin sheath result in many neurological disorders.
Hence, the correct answer is myelin sheath.
Oxygen is used up in the body of most organisms and Carbon dioxide is released. The body uses oxygen to break down glucose to supply energy tot he body. In result of this reaction carbon dioxide and water is released into the system along with energy. The carbon dioxide is then exhaled into the air by the respiratory system of the organisms.
Answer:
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1) About 23 percent of incoming solar energy is absorbed in the atmosphere by water vapor, dust, and ozone
2) Approximately 1.225 kg/m³
(<em>D</em><em>I</em><em>S</em><em>C</em><em>L</em><em>A</em><em>I</em><em>M</em><em>E</em><em>R</em><em>:</em><em> </em><em>It </em><em>c</em><em>hanges with variation in atmospheric pressure, temperature and humidity.</em><em>)</em>
3) The moon's gravitational pull on the Earth is the main cause of the rise and fall of ocean tides.
4) WIND
The uneven heating of the atmosphere causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.
