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 |
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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 |
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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 |
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1. Only II is incorrect | 2. I and II are correct |
3. III and IV are incorrect | 4. All are correct |
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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. |
Myelin sheath around the axons in the PNS is secreted by:
1. oligodendrocytes | 2. axons |
3. Schwann cells | 4. ependymal |
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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 |
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