हीमोग्लोबिन के निर्माण के लिए निम्नलिखित में से किस तत्व की आवश्यकता होती 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 ________.