मानव मस्तिष्क के किस भाग में 'भोजन केंद्र' (भूख नियंत्रण केंद्र) स्थित 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 ________.