It is a hostile environment of hydrochloric acid. Mucus is the first line of defense in protecting the lining, but when acidity increases it can erode the lining. If the acid breaks through the lining, the secretion of another protein is stimulated, which increases the production of hydrochloric acid, thereby establishing a destructive cycle. Until recently, a bland diet was recommended to prevent and reverse this disorder, but now physicians treat most forms of the disorder with antibiotics instead.
To what disorder is the information referring?

A woman is most likely to get pregnant if she has unprotected sex a few days before and on the day of ovulation, when the egg is released from the ovaries. The release of the egg is hormonally stimulated,meaning that a hormone in the woman’s body triggers ovulation. On average, women ovulate around the 14th day of their menstrual cycle. The following is a graph show- ing the levels of three hormones throughout the menstrual cycle of an average woman.

Based on the graph, which hormone is most directly responsible for triggering ovulation?

Monera (bacteria): Single-celled prokaryotic organisms; reproduce by binary fission (simple cell division); found in every habitat
Protista (protists): Single-celled eukaryotic organism; include plantlike, animal-like, and fungi-like organisms; reproduce by binary fission
Fungi: Single-celled and multicellular eukaryotic organisms; cells reproduce by either budding (forming a string of cells) or binary fission
Plantae (plants): Multicellular eukaryotic organisms with cell walls; make their own food from the Sun’s energy
Animalia (animals): Multicellular eukaryotic organisms without cell walls; ingest food and process it internally
The cells of eukaryotic organisms contain a distinct nucleus, and their DNA is organized into chromosomes. The cells of prokaryotic organisms lack these features.