Name two feedback loops that regulate digestive system smooth muscle responsible for propulsive and mixing movements.

The two feedback loops that regulate digestive system smooth muscle responsible for propulsive and mixing movements are: positive feedback loop and negative feedback loop. The former can be defined by the release of acid and pepsinogen, while the latter results in less acid secretion. Another example for the positive mechanism outside digestive system is process involved blood clotting. For the negative mechanism, a simpler example would be how our body controls sugar through the use of insulin.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey