Stomach Physiology

Stomach Physiology

Articles tagged with "Stomach Physiology".

Complete Guide to Stomach Physiology and Function

Tags: Stomach Physiology, Gastric Function, Acid Production, Digestive System

November 7, 2025

How Does Your Stomach Actually Work?

The stomach is a complex muscular organ that serves multiple critical functions including acid production for digestion and antimicrobial defense, protein synthesis for vitamin absorption, mechanical breakdown of food into chyme, and coordination of digestive processes through neural and hormonal signaling. Contrary to popular belief, the stomach does not absorb nutrients but rather prepares food for absorption in the small intestine through chemical and mechanical processing.

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The Proton Pump: How Your Stomach Makes Acid

Tags: Gastric Acid Secretion, Proton Pump, H K ATPase, Stomach Physiology

November 7, 2025

How Does Your Stomach Actually Produce Acid?

Gastric acid secretion occurs through the H,K-ATPase enzyme system (the “proton pump”) in gastric parietal cells, which actively transports hydrogen ions into the stomach lumen in exchange for potassium ions. This sophisticated molecular machinery can produce stomach acid with a pH as low as 0.8, making it one of the most acidic environments in the human body and essential for digestion, nutrient absorption, and antimicrobial defense.

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