23. In some cases, the neurotransmitter is broken down by enzymes, and the break

Question

23. In some cases, the neurotransmitter is broken down by enzymes, and the breakdown products are taken up by the presynaptic cell. The neurotransmitter is an example of this process. A. acetyl choline (ACh) B. -aminobutyric acid (GABA) B. norepinephrine (NE) C. glycine (Gly) Cerebrospinal fluid is produced by the A) choroid plexus. B) arachnoid villi. C) frontal sinuses. D) pia mater. E) ventricles. 24. Cell bodies of sensory neurons are located in A) propriospinal tracts. B) ventral root ganglia. C) ventral horns. D) dorsal horns. E) dorsal root ganglia. 25.

Explanation / Answer

23. Acetylcholine is a neurotransmitter which is broken down by enzyme Acetycholinesterase into two inactive metabolites choline and acetate which are taken up by the presynaptic cell.

Hence option (A) is correct.

24. Cerebrospinal fluid is produced from arterial blood by Choroid Plexus by the process of diffusion and active transport.

Hence option (A) is correct.

25. Cell bodies of sensory neurons are located in dorsal root ganglia of the spinal cord.

Hence option (E) is correct.

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