Consider the following statementI Experimental hypertension can be produced to stimulating sinoaortic nerveII Sino-aortic nerve normally stimulates vasomotor centre Of these statements

(A) I is true but II is false Stimulation of the noradrenergic nerves to the intestine inhibits contractions in vivo.> Norepinephrine exerts both a & ft actions on the muscle> The b action, reduced muscle tension in response to excitation, is mediated via cyclic AMP and is probably due to increase: tracellular binding of Ca2+.> The a action, which is also inhibition of contraction, is associated with increased Ca2+ efflux from the muscle cells.