Pepsin is a digestive enzyme. It is made in an inactive form, pepsinogen, which is activated by the acidity of the stomach to self-cleave. The cleaved molecule is active pepsin, which goes on to cleave more pepsinogen molecules, leading to a cascade of rapid pepsin activation. This pathway is an example of.

A. a positive feedback loop.
B. conditioning.
C. a negative feedback loop.
D. feedforward regulation.
E. homeostasis

Name the organs of humanelemintary canal.

The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return

Number and variety of living organisms includes genetic, species, and ecological types