Q. No.Four cavities located within the brain that contain cerebral spinal fluid are known as:
1.
sinusoids
2.
vesicles
3.
ventricles
4.
lobules
The outer covering of gray matter over the hemispheres is called as the cerebral:
| 1. | cortex | 2. | medulla |
| 3. | gyri | 4. | sulci |
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The cochlear division of the VIII cranial nerves transmits impulses from the cochlea of the ear to:
1. the hypotahlamus
2. the parietal lobes
3. the temporal lobes
4. the postcentral gyrus
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The waves most likely to appear on an EEG due to active, busy or anxious thinking and active concentration would be:
1. alpha wave
2. beta wave
3. theta wave
4. delta wave
Pons varolli of the brain stem does not have:
1. cardiac control center
2. pneumotaxic center
3. fibers of cerebellar peduncle
4. nuclei where some cranial nerves originate
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All the following statements regarding the glial cells are correct except:
1. They are rare when compared to neurons
2. They can respond to injury
3. They function in myelin sheath synthesis
4. They help in regulation of neuronal environment
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In a single-ion system, reversal potential is synonymous with equilibrium potential; their numerical values are identical, and it:
1. Is a function of the concentration of that ion on the extracellular side of the membrane
2. Is a function of the concentration of that ion on the intracellular side of the membrane
3. Is the potential at which there is no movement of that ion across the membrane due to electrochemical forces
4. Is the potential at which there is equal movement of that ion into and out of the cell across the membrane due to electrochemical forces
The resting membrane potential is first established because of:
1. the movement of potassium ions down their electrical gradient through leak channels
2. the opening of voltage-gated sodium channels
3. the action of the Na+/K+ ATPase pump which transports positive ions in unequal numbers
4. the movement of sodium ions against their concentration gradient through leak channels
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What is true for the events that occur during the generation of an action potential?
1. Potassium channels in the membrane open in response to depolarization
2. Sodium channels in the membrane open in response to neurotransmitter released from the adjacent membrane
3. The increase in sodium permeability in the membrane is an example of positive feedback
4. The movement of sodium into the neuron causes the cell to hyperpolarize
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