Heartburn, Ulcers, and your Stomach

Acidic Gastric Juices

Gastric juices are highly acidicA solution with a pH below 7, having a higher concentration of H⁺ ions. to kill microorganisms and denatureThe process in which a protein loses its shape and function due to heat or pH changes. proteinsLarge molecules made of amino acids with various functions in the body.. This acidity also helps break down tough tissues in animal and plant foods, like tendons and cellulose. As food enters the stomach, salivary enzymesProteins that speed up chemical reactions in the body. stop working, and stomach enzymes take over. For example, the amylase in saliva functions at a higher pHA measure of hydrogen ion concentration in a solution.. Stomach amylase, however, works in the stomach’s low pH environment.

Mucosal Barrier

Nutrient absorption does not occur in the stomach due to structural and functional reasons. The stomach is lined with a mucus barrier that prevents the absorption of small moleculesGroups of atoms bonded together.. Additionally, digestion is incomplete in the stomach, and this is sensed by chemoreceptors. The stomach protects itself from its own acidic environment. It does so with a bicarbonate-rich mucus lining. Rapid cell turnover also plays a role, shedding old cellsThe basic structural and functional units of life. into the digestive tract.

Ulcers

However, if the mucosal barrier is compromised, as with Helicobacter pylori infection, ulcers can develop. This bacterium exploits areas where the lining is damaged, further eroding the stomach’s protective barrier. Keeping the mucosal barrier healthy is crucial to prevent such issues.

Heartburn

Parietal cells can become overactive for various reasons. These include excess gastrinA hormone that stimulates gastric acid secretion and motility. and histamine release, which could be due to mild allergies. Another cause is the overstimulation by the vagus nerve releasing acetylcholinealso know as ACh A neurotransmitter that stimulates muscle contraction.. Treatment options include antihistamines and anticholinergic drugs. Proton pump inhibitors (PPIs) like omeprazole block hydrochloric acidA substance that releases hydrogen ions (H⁺) in solution. secretionThe process of moving substances from the blood into the nephron tubule to be excreted in urine. at the source. However, finding the right PPI can take time.