रक्त में मौजूद कौन सी कोशिकाएं मानव शरीर को बीमारी पैदा करने वाले रोगाणुओं से लड़ने में मदद करती हैं?

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 ________.