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Question

Which one of the following is not essentially a part of nervous system?

A
Cyton
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B
Axon
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C
Myelin sheath
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D
Intermedin
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Solution

The correct option is D Intermedin
A nerve cell or neuron is the structural and functional unit of the nervous system. It has a cell body called cyton and two types of processes called axon and dendrite. Dendrites are the short cytoplasmic processes of the cell body, which receive stimulus from other neurons. The axon is a long extension of a neuron and may be covered by a lipid-rich membrane, called a myelin sheath.
Intermedin, on the other hand, is a hormone produced by the intermediate lobe of the pituitary gland in certain vertebrates. It is also known as melanocyte-stimulating hormone.
Thus, the correct answer is option D.


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