8. The basal nuclei are located in the: A. Brain stem B. Cerebrum C. Cerebellum

Question

8. The basal nuclei are located in the: A. Brain stem B. Cerebrum C. Cerebellum D. Diencephalon E. Limbic system 9. Oculomotor nerve is CN-. with A. II, only motor B. IlI, only motor C. II, both sensory and motor D. III, both sensory and motor component(s). 10. Which neuroglia is involved in forming blood-brain barrier? A. Oligodendrocytes B. Astrocyte C. Microglia D. Ependymal cells E. Schwann cells 11. Which ion channel contributes to the existence of the resting membrane potential? A. Voltage-gated Na* channels B. Mechanically-gated ion channels C. Na* and K* Leak channels D. Ligand-gated ion channels

Explanation / Answer

Answer 8:- Option B

Explanation:- Basal nuclei is also known as basal ganglia. It is a cluster of neuron that is located deep beneath the cerebral cortex. The exact location of the basal nuclei is at the base of forebrain. The cerebrum is composed of cerebral hemispheres which incluse, cortex, white matter and basal nuclei.

Answer 9:- Option B

Explanation:- Occulomotor is the third cranial nerve and is responsible for eyeball and eyelid movement. It has only motor component. The motor component is divided into two types ‘the somatic motor component’ and ‘the visceral motor component’.

Answer 10:- Option B

Explanation:- Astrocytes exists in great variety and is present in abundance in the CNS. Astrocytes perform varies roles including axon guidance and synaptic support and control of the blood brain barrier and blood flow.

Answer 11:- Option C

Explanation:- The Na+ and K+ leak channels maintain the movement of these channels from a high concentration toward a lower concentration across the cell membrane. The leaked ions enable the cell to maintain a stable resting membrane potential.

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