Answer:
Pepsinogen is produced by chief cells and is activated by hydrochloric acid secreted by parietal cells.
Explanation:
Pepsinogen is a proenzyme produced in the chief cells (that are located in the stomach lining) that, when gets activated, is transformed into pepsin - a peptidase with the function to degrade proteins into amino acids.
The reason why pepsinogen is released inactive is that it would break down all of the cell's proteins because of its proteolytic nature. For this reason, it is released as a proenzyme and gets activated when reaches the acidic environment provided by the hydrochloric acid secreted by the parietal cells, also in the stomach lining.
Answer:
I think it's an example of equilibrium
Carl Linnaeus, a Swedish botanist
Answer:
b) Apical surface
Explanation:
Apical surface is the portion of an epithelial cell in the stomach that food wouold be in contact with.
Answer:
Induction, in embryology, process by which the presence of one tissue influences the development of others.
