<prompt> Bilateral cutting of vagus nerve causes ?Decrease hea rateDecrease respiratory rateIncrease hea rateDecreased BP  <response>: 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. 