साँस लेने के तरीके (breathing pattern) की परवाह किए बिना फेफड़े का कौन सा आयतन अपरिवर्तित रहता 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 ________.