न्यूरोट्रांसमीटर नोरेपेनेफ्रिन (norepinephrine) मुख्य रूप से निम्नलिखित में से किस एंजाइम द्वारा निष्क्रिय किया जाता है?

Which digestive hormone inhibits both gastric secretion and motility, stimulates insulin release, and is secreted mainly when fat is present in the duodenum?

The repeated sequence of gradual onset of apnoea followed by gradual restoration of respiration is called ________.