This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Bilateral cutting of vagus nerve causes ? \nSelect and explain. \nA. Decrease hea rate, B. Decrease respiratory rate, C. Increase hea rate, D. Decreased BP', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Increase hea rate Aoic nerve (a branch of vagus nerve) carries :? i) Baroreceptor afferent from Aoic sinus. ii) Chemoreceptor afferent from Aoic bodies. Bilateral sectioning of vagus nerve causes increase in hea rate and BP due to two reasons :? i) Abolition of baroreceptor discharge of aoic sinus on RVLM - causing increasing in sympathetic output. ii) Inhibition of nucleus ambiguous - causing decreased parasympathetic tone. Effect on chemoreceptors afferent is minimal as chemoreceptors are stimulate by low PO, and normally they have no dischange.", 'role': 'assistant'}]