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प्रश्न
Differentiate between Spinal nerves and Cranial nerves (number of nerves).
Distinguish between the following pair:
Cranial nerves and spinal nerves (number in pairs)
उत्तर
| Cranial nerves | Spinal nerves |
| Cranial nerves emerge from the brain. There are 12 pairs of cranial nerves, some of which are sensory, like the olfactory (for nose), the optic (for eyes) and auditory (for ears), motor nerves like the ones going to the eye muscles, and mixed nerves like those going to and coming from the face and tongue. | Spinal nerves emerge from the spinal cord. There are 31 pairs 8 pairs in the neck region, 12 pairs in the thorax, 5 pairs in the lumbar region, 5 pairs in the sacral and 1 pair in the coccygeal region. |
Notes
Students should refer to the answer according to their questions.
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संबंधित प्रश्न
Define the term Motor neuron.
Name the following:
Neuron only with axon.
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 released on activation.
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.
Bipolar neurons are found in ______
‘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 are responsible for formation of myelin sheath?
What is the connective tissue covering around the nerve fascicle called?
Identify the parts of a neuron which help the nerve impulse to travel towards the cell body.
