वह मुख्य शारीरिक प्रक्रिया कौन सी है जिसके लिए मानव निरंतर वायुमंडलीय हवा पर निर्भर 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 ________.