If a person is suffering from gerd, the is malfunctioning.

esophageal sphincter

Explanation:

Gastroesophageal reflux disease (GERD) is one of the most important digestive disorders given the high and increasing incidence, the intensity of the symptoms and the severity of the complications. Is defined as a condition that matters when the reflux of gastric contents causes symptoms and complications.  Heartburn, or pyrosis, is a backward burning sensation and that can be felt up to the cervical region. The most common triggering aliments are greasy or spicy foods, citrus fruits, carminatives, coffee, soft drinks, alcohol, large meals, tobacco, medicines and bedtime immediately after meals.  The factors of relief are ingestion of milk, water or antacids.

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.