The answer is: 2 (two) .
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Answer: Central Nervous System
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The two major subdivisions are the central nervous system and the peripheral nervous system. The CNS includes the brain and spinal cord, while the PNS is everything else outside it.
Gastrin; major activities: Stimulates gastric acid secretion and proliferation of gastric epithelium
B. 2 there are 2 perpendicular rays when a polarized white light is sent through synthetic fiber.