मानव शरीर में लाल रक्त कोशिकाओं (एरिथ्रोसाइट्स) का प्राथमिक कार्य क्या 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 ________.