यूरिया चक्र शरीर से विषाक्त अमोनिया को हटाता है। यह चक्र मुख्य रूप से कहाँ होता 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 ________.