Nerve fibres of the parasympathetic nervous system arise from the central nervous system. Specific nerves include several cranial nerves, specifically the oculomotor nerve, facial nerve, glossopharyngeal nerve, and vagus nerve. Three spinal nerves in the sacrum (S2-4) also act as parasympathetic nerves.
The word longevity is sometimes used as a synonym for life expectancy in demography - however, the term longevity is sometimes meant to refer only to especially long-lived members of a population, whereas life expectancy is always defined statistically as the average number of years remaining at a given age.
Select the correct statement about pi-bonds in valence bond theory. A) A sigma bond is stronger than a pi bond. B) A pi bond can hold 4 electrons, two above and two below the Ï-bond (sigma) axis. C) A carbon-carbon double bond consists of two Ï (pi) bonds. D) A Ï bond is the same strength as a Ï... show more Select the correct statement about pi-bonds in valence bond theory. A sigma bond is stronger than a pi bond. B) A pi bond can hold 4 electrons, two above and two below the Ï-bond (sigma) axis. C) A carbon-carbon double bond consists of two Ï (pi) bonds. D) A Ï bond is the same strength as a Ï bond. E) A Ï bond between two carbon atoms restricts rotation about the CâC axis.