| 1. | Neurons contain a single axon and several dendrites. |
| 2. | Neurons do not have a nucleus in the cell body. |
| 3. | The axon transmits electrical signals towards the cell body. |
| 4. | Dendrites do not play a role in signal reception. |
| Assertion (A): | Neurons are excitable. |
| Reason (R): | The membrane of neurons is in a polarised state. |
| 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. |
| Assertion (A): | The myelin sheath increases the speed of nerve impulse conduction. |
| Reason (R): | The myelin sheath acts as an insulator and allows saltatory conduction of nerve impulses. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True but (R) is False |
| 4. | Both (A) and (R) are False |
| Assertion (A): | Corpus callosum connects the two cerebral hemispheres |
| Reason (R): | Association area are responsible for complex functions like intersensory association, memory and communication |
| 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. |
The structure marked as X in the following diagram showing sagittal section of the human brain would be:
| 1. | Corpora quadrigemina |
| 2. | Limbic system |
| 3. | Corpus callosum |
| 4. | Hippocampal gyrus |
| 1. | meninges, cerebrospinal fluid, and skull bones |
| 2. | meninges and skull bones only |
| 3. | dura mater and fourth ventricle |
| 4. | pia mater and skull bones |
| A | B | C | |
| 1. | Cerebellum | Medulla | Pons |
| 2. | Cerebrum | Medulla | Pons |
| 3. | Cerebrum | Pons | Olfactory lobe |
| 4. | Corpus callosum | Cerebrum | Medulla |