Biology - Neural Control and Coordination Question with Solution | TestHub
Select the correct statements regarding parasympathetic nervous system.
a) Cranial out flow consists of branches from III, VII, IX and X cranial nerves.
b) Pre-ganglionic fibers are short and post-ganglionic fibers are long.
c) Acetylcholine is produced at the terminal end of pre-ganglionic fibers.
d) It accelerates peristalsis and micturition
e) It controls body activities during fight or flight response.
Options:
Answer:
Solution:
Statement a is correct. The parasympathetic nervous system has a craniosacral outflow, which includes cranial nerves III (Oculomotor), VII (Facial), IX (Glossopharyngeal), and X (Vagus).
Statement b is incorrect. In the parasympathetic nervous system, pre-ganglionic fibers are long and post-ganglionic fibers are short, as the ganglia are located close to or within the effector organs.
Statement c is correct. Acetylcholine is released at the pre-ganglionic nerve terminals of both the sympathetic and parasympathetic nervous systems.
Statement d is correct. The parasympathetic nervous system promotes "rest and digest" activities, which include accelerating peristalsis (digestion) and stimulating micturition (urination).
Statement e is incorrect. The sympathetic nervous system is responsible for the "fight or flight" response, whereas the parasympathetic nervous system controls "rest and digest" functions.
Among the given choices, the only option containing a pair of correct statements is a and d.
Answer: a and d
