हमारे शरीर में अम्लीयता तथा क्षारकता के बीच संतुलन बनाए रखने में निम्नलिखित में से कौन सा तत्व मुख्य भूमिका निभाता 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 ________.