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प्रश्न
Write one word for the following:
Long thread-like part of the nerve cell.
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उत्तर
Axon
संबंधित प्रश्न
Complete the following statement by choosing the correct alternative from the choice given in below :
The dorsal root ganglion of the spinal cord contains cell bodies of ________ neurons.
State whether the following statement is true (T) or false (F).
A double chain of ganglia, one on each side of the nerve cord belongs to the spinal cord.
The action potential occurs in response to a threshold stimulus; but not at sub-threshold stimuli. What is the name of the principle involved?
‘A’ is a cylindrical structure that begins from the lower end of the medulla and extends downwards. It is enclosed in bony cage ‘B’ and covered by membranes ‘C’. As many as ‘D’ pairs of nerves arise from the structure ‘A’.
(i) What is A?
(ii) Name (a) bony cage ‘B’ and (b) membranes ‘C’
(iii) How much is D?
Which cells form a single layer of squamous or columnar often ciliated epithelial cells lining the ventricle?
What is the connective tissue covering around the nerve fascicle called?
Explain the function of the neuron.
Chemicals which are released at the synaptic junction are called ______.
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
Axons : Nerve :: Cytons : ______.
The figure given below is the basic structural and functional unit of the human nervous system. Study the diagram and answer the following questions:
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- Write the technical term for the diagram.
- Name two organs of our nervous system where these cells are richly found.
- How are these cells significant for us?
- Name the cell organelle that is absent in these cells and how does it affect our body metabolism?
- Redraw the same figure and label the following Perikaryon, Axon, Dendrites, Myelin sheath and Node of Ranvier.
