Q. No.| 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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| 1. CNS | 2. Somatic neural system |
| 3. Autonomic neural system | 4. Visceral neural system |
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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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The resting axonal membrane is impermeable to:
I. Sodium ions
II. Potassium ions
III. Negatively charges proteins present in the axoplasm
| 1. I and II only | 2. I and III only |
| 3. II and III only | 4. I, II and III |
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 |
Given figure shows the types of neurons found in human body. Identify the correct match for their location in the body from the options given: |
| I. Embryonic stages | II. Retina |
| III. Dorsal root ganglion of spinal nerve | |
| IV. Cerebral cortex | V. Olfactory membrane |
| A | B | C | D | |
| 1. | I | II | III | IV |
| 2. | II | V | I | III |
| 3. | I | III | II | IV |
| 4. | III | IV | II | I |
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 |
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| Assertion (A): | Neurons are excitable cells. |
| Reason (R): | Their membranes are in a polarised state. |
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. | (A) is false but (R) is true. |
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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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