<prompt> Consider the following statementI Experimental hypertension can be produced to stimulating sinoaortic nerveII Sino-aortic nerve normally stimulates vasomotor centre Of these statementsI is true but II is falseBoth I and II are trueI is false but II are trueBoth I and II are false  <response>: 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. 