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Why are nerve cells long? Why these cells have projection

Dear Student,

Please find below the solution to the asked query:

Neuron is the longest cell in the body due to the following reasons:  
  • Neurons are specialized cells, they are long due to presence of an elongated projection known as the axon. They also have a few small projections known as dendrites. The dendrites receive signals from other neurons and axons transmit signal further to the neighbouring neurons. 
  • Nerve cells or neurons present in brain and other parts of the body make a network, through which messages are conducted to and fro i.e. from brain to other parts of the body and vice versa.

Hope this information will clear your doubts about the topic.

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The cell is the basic structural,functional and biological unit of life of all living organisms.Cells are the smallest unit of life that can replicate independently,and are often called the “building blocks of life”.The study of cells is called cell biology. Question: Who discovered the cell? Answer:Cell was discovered by Robert Hooke in 1665.The cell theory, developed in 1839 by Mathias Jakob Schleiden and Theodor Schwann,states that all organisms are composed of one or more cells and all cells come from preexisting cells. Question: Give three examples of unicellular organisms. Answer: Three examples of unicellular organisms are : 1.Amoeba 2.Acetabularia 3.Protists Question :Why cells could not be observed before 17th century? Answer: Majority of the cells are too small in size.Cells could not be observed before 17th century because of their small size, also the lens of microscope were not electronic as of today. Question: Why cork could not be observed as such by Hooke? Answer: Cork could not observed as such by Hooke because it was a solid structure.He found that the cork was made of box-like compartments forming a honeycomb structure.He named these compartments as cells. Question: Where did Hooke demonstrate his observations on cork slice? Answer: Hooke observed thin slices of cork under his crube microscope.He demonstrated his work to scientist at Royal Society Of London.
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