- 1(current)
Q. No.Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes:
| Column I | Column II | ||
| A. | Peripheral neural system | P. | Comprises of all nerves associated with brain and spinal cord |
| B. | Somatic neural system | Q. | Relays impulses from CNS to skeletal muscles |
| C. | Visceral neural system | R. | Transmits impulse from CNS to involuntary organs and smooth muscles |
| D. | Autonomic neural system | S. | Part of PNS where impulses travel from CNS to the viscera and from the viscera to the CNS |
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | R | S | P |
| 3. | R | S | P | Q |
| 4. | S | P | Q | R |
Subtopic: Nervous System |
67%
From NCERT
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In a neuron, Nissl’s granules are seen in:
| I. Cell body | II. Dendrites | III. Axon |
| 1. I and II only | 2. I and III only |
| 3. II and III only | 4. I, II and III |
Subtopic: Nervous System |
89%
From NCERT
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Code:
| Column I | Column II | ||
| A. | Multipolar neuron | P. | Embryonic stage |
| B. | Bipolar neuron | Q. | Retina |
| C. | Unipolar neuron | R. | Cerebral cortex |
| A | B | C | |
| 1. | P | Q | R |
| 2. | Q | R | P |
| 3. | R | Q | P |
| 4. | R | P | Q |
Subtopic: Nervous System |
92%
From NCERT
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Consider the given statements:
| I: | Myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon. |
| II: | Unmyelinated nerve fibre is not enclosed by a Schwann cell or a myelin sheath. |
| III: | Myelinated nerve fibres are found in spinal and cranial nerves. |
| IV: | Unmyelinated nerve fibres are commonly found in autonomous and somatic neural systems. |
| 1. | Only II is incorrect | 2. | I and II are correct |
| 3. | III and IV are incorrect | 4. | All are correct |
Subtopic: Nervous System |
67%
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
| Assertion (A): | Action potential propagation in unmyelinated neurons is faster than in myelinated neurons. |
| Reason (R): | Myelin is a complex polysaccharide and it slows the conduction of the impulse along the axonal membrane. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Nervous System |
71%
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Myelin sheath around the axons in the PNS is secreted by:
| 1. | oligodendrocytes | 2. | axons |
| 3. | Schwann cells | 4. | ependymal |
Subtopic: Nervous System |
82%
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The cranial meninge that is in contact with the brain tissue is the:
| 1. Dura mater | 2. Arachanoid mater |
| 3. Pia mater | 4. Grey matter |
Subtopic: Nervous System |
84%
From NCERT
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- 1(current)
Q. No.
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