7) Neurons normally derive ATP solely through A) aerobic respiration. B) anaerob
ID: 303023 • Letter: 7
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7) Neurons normally derive ATP solely through A) aerobic respiration. B) anaerobic respiration. C) formation of creatine phosphate. D) use of stored glycogen. E) both A and D 8-12) Match the cranial nerve in the first column wvith its innervation in the second column. 8. oculomotor 9. trigeminal 10. hypoglossalC. 11. vagus 12. vestibulocochlear A. 3 out of 4 rectus muscles of the eye B. tongue muscles D. ear E. thoracic and abdominal organs teeth, muscles of mastication 13) The glial cells responsible for maintaining the blood-brain barrier are the A) astrocytes. B) Schwann cells. C) microglia. D) ependymal cells. E) fiber cells. 14) The cytoplasmic extensions that, together with the cell body, provide the main receptive surfaces for neurons are the A) axons B) soma. C) synapses. D) dendrites. E) neurofibrils. 15) Which of the following is a function of neurons? A) support B) information processing C) secretion of cerebrospinal fluid D) isolation of neuroglia E) phagocytosis 16) The largest and most numerous of the glial cells in the central nervous system are the A) astrocytes. B) Schwann cells. C) oligodendrocytes. D) microglia. E) ependymal cells.Explanation / Answer
7- neurons normally derive ATP solely through- A) Aerobic respiration.
The energy requirements of brain are very high, tight regulatory mechanisms ensures the adequate delivery of energy substrates with neuronal activity. Glucose is the sole energy source for the brain. The ATP is generated through the glycolytic pathway. aerobic respiration is the only way that can provide the sufficient amount of energy to the brain.
8- oculomotor- A- 3 out of 4 rectus muscles of eye.
9- trigeminal- C- teeth, muscles of mastication
10- Hypoglossal- B- tongue muscles
11- vagus- E-Thoracic and abdominal organs
12- Vestibulocochlear - D- Ear
13- The glial cells responsible for maintaining the blood-brain barrier are - A) Astrocytes. [ Central nervous system is extremely sensitive to wide range of substances so there is a need of a barrier that can support the both central nervous system and peripheral nervous system by acting as regulator for ions, nutrients transport and barrier for harmful substances. These astrocytes act as blood brain barrier in the CNS .
14- The cytoplasmic extensions that together with the cell body provide the main receptive surfaces for the neurons are - D) Dendrites. [ Dendrites are the extension from the cell body act as receptors, they receive the signals and forward them towards the cell body.]
15- Answer option B- information processing is the major role and function of neurons.
16- The largest and most numerous of the glial cells in CNS are the A) Astrocytes. [Astrocytes are the specialized glial cells present only in the CNS]
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