Question Detail
Question
Consider the following statements: Parasympathetic nervous system is characterized by 1. Acetylcholine as neurotransmitter. 2. 'Fight or flight' activities. 3. Longer preganglionic fibres. 4. Longer postganglionic fibres. 5. Arising from cranio-sacral portion. Which of the statements given above are correct?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The parasympathetic nervous system is characterized by: (1) acetylcholine as the neurotransmitter at both pre- and postganglionic synapses; (3) longer preganglionic fibers and shorter postganglionic fibers; and (5) arising from the cranio-sacral (brainstem and sacral spinal cord) portion. Statement 2 describes the sympathetic nervous system ('fight or flight'), and statement 4 is incorrect because parasympathetic fibers have shorter postganglionic fibers.
Hint
Recall the anatomical and neurotransmitter features that distinguish the parasympathetic division from the sympathetic division.