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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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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1. | is comparatively more permeable to sodium ions and nearly impermeable to potassium ions. |
2. | is freely permeable to sodium ions and potassium ions. |
3. | is impermeable to sodium ions and potassium ions. |
4. | is comparatively more permeable to potassium ions and nearly impermeable to sodium ions. |
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1. | 3 sodium ions outwards and 2 potassium ions into the cell. |
2. | 3 sodium ions into the cells and 2 potassium outwards. |
3. | 2 sodium ions outwards and 3 potassium ions into the cell. |
4. | 2 sodium ions into the cells and 3 potassium ions outwards. |
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1. | The outer surface possesses a positive charge while its inner surface becomes negatively charged. |
2. | The outer surface possesses a negative charge while its inner surface becomes positively charged. |
3. | Both the outer and the inner surface are positively charged. |
4. | Both the outer and the inner surface are negatively charged. |
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The re-establishment of the resting membrane potential after depolarization is primarily due to:
1. Sodium potassium pump | 2. Influx of sodium |
3. Efflux of potassium | 4. Efflux of sodium |
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Consider the two statements:
I: | Electric synapses are rare in our system. |
II: | Impulse transmission across electric synapse is always faster than across a chemical synapse. |
1. Both I and II are correct and II explains I
2. Both I and II are correct and II does not explain I
3. Only I is correct
4. Only II is correct
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What causes the movement of the synaptic vesicles towards the membrane during transmission of impulse across a chemical synapse?
1. Sodium | 2. Calcium |
3. cAMP | 4. cGMP |
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Myelin sheath around the axons in the PNS is secreted by:
1. oligodendrocytes | 2. axons |
3. Schwann cells | 4. ependymal |
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