In order, the answers are position, Sun, and circular.
Histamine in Digestion Histamine plays a role in gastric secretion by helping to induce the production of acid in the stomach. Histamine in sleep: the body regulates the amount of histamine in circulation and maintains a careful balance.
Answer:
The proton–proton chain, also commonly referred to as the p–p chain, is one of two known sets of nuclear fusion reactions by which stars convert hydrogen to helium.
