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Upon submersion (or irritation stimulus), the nasopharyngeal reflex (aka “diving reflex”) triggers a(n) ( Increase, Decrease ) of Sympathetic vasomotor activity, which results in ( Increased, Decreased ) TPR. It also triggers a(n) ( Increase, Decrease ) in Cardiac vagal activity, which results in a decreased HR and decreased CO. The net effect of this is ( Increased, Decreased ) Oxygen conservation.