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प्रश्न
Differentiate between Dendrites and axons.
उत्तर
| Dendrites | Axons | |
| 1. | The dendrite is a small projection arising from the neuron. It conducts the nerve impulse towards the cell body. | Axon is a single, long projection that conducts the nerve impulse away from cell body to the next neuron. |
| 2. | Nissl’s granules are present in dendrites. | Nissl’s granules are absent from axons. |
| 3. | They are close to the nerve body. | These are distal to the nerve body. |
| 4. | These are small and larger in number. | These are long and cylindrical at the base. |
| 5. | These carry the stimuli to the cell body. | They carry impulses from the cell body to other nerve cells. |
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संबंधित प्रश्न
Distinguish between Impulse conduction in a myelinated nerve fibre and unmyelinated nerve fibre
Draw neat and labelled diagrams of a myelinated neuron
Identify the odd one in each set : Cyton, Photon, Axon, Dendron
Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong:
Dendrites, Medullary sheath, Axon, Spinal cord
Mention the exact location of Epididymis
State whether the following statement is true (T) or false (F):
There are 31 pairs of cranial nerves.
Describe the two parts of the nervous system.
Identify the ODD term in each set and name the CATEGORY to which the remaining three belong :
Axon, Dendron, Photon, Cyton
Write whether the following is true or false:
Axon of one neuron communicates with other nerve cell through synapse.
Write whether the following is true or false:
Neurotransmitters are either broken down or reabsorbed after they have conducted an impulse.
Explain the following term :
Motor nerve
Explain the following term :
Association neuron
Write a short note.
Autonomic Nervous System
Assertion: The imbalance in concentration of Na+, K+ and proteins generates action potential.
Reason: To maintain the unequal distribution of Na+ and K+, the neurons use electrical energy.
Impulses travels rapidly in ______ neurons.
How nerve impulses are transferred from one neuron to the next neuron?
‘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 of the following statements about transmission of nerve impulse is incorrect?
Rearrange the following in the correct order of involvement in electrical impulse movement-
Synaptic knob, dendrites, cell body, Axon terminal, Axon
Name the following:
Three types of neurons
