Stomach Hormones
Stomach Hormones - Related Videos
01:25
Hormones Secreted by the Stomach
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2024
Enteroendocrine cells, accounting for only 1% of stomach epithelial cells, play a significant role in digestion and are classified by their digestive hormone secretions. Each of these hormones secreted by different enteroendocrine cells plays a unique role in digestion. Here are a few examples: Gastrin: The G cells secrete gastrin, a hormone that stimulates the production of gastric acid and enzymes. It enhances the contraction of stomach muscles, facilitating food movement through the...
02:13
Types of Hormones
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2019
Hormones can be classified into three main types based on their chemical structures: steroids, peptides, and amines. Their actions are mediated by the specific receptors they bind to on target cells. Steroid hormones are derived from cholesterol and are lipophilic in nature. This allows them to readily traverse the lipid-rich cell membrane to bind to their intracellular receptors in the cytoplasm or nucleus. Once bound, the cytoplasmic hormone-receptor complex translocates to the nucleus.
01:33
Hormonal Regulation
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2019
The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
01:56
Plant Hormones
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2020
Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands. Instead, plant hormones are often produced in regions of active growth, like the tips of roots and shoots. Additionally, even very low concentrations of plant hormones can have a profound effect on growth and development processes.
10:12
Gross Dissection of the Stomach of the Lobster, Homarus Americanus
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Cited by 5 •
2009
We describe the gross dissection of the stomach of the American lobster (Homarus americanus).
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Gastrin links food-related signals to two coordinated responses: increased acid secretion and growth of the stomach mucosa. Its activity therefore supports digestion while also influencing the tissue environment where digestion occurs. In biology, gastrin provides an example of how one hormonal signal can produce both an immediate functional effect and a longer-term change in stomach tissue.
Ghrelin promotes hunger and influences energy balance, whereas somatostatin suppresses gastrin and acid production. These contrasting effects help connect appetite-related signaling with control of digestive activity. Studying them together shows that stomach regulation depends on interacting signals rather than on a single hormone acting independently, especially when researchers examine feeding and acid-related processes.
Food, physical distension, and changes in acidity provide different types of information to the stomach’s signaling system. These conditions can influence the release or activity of hormones that regulate acid production, appetite, and gastrointestinal movement. Considering all three inputs helps explain why digestive responses change according to both the stomach’s contents and its chemical environment.
Stomach hormone research can connect altered signaling with conditions such as ulcers, reflux, obesity, diabetes, and other digestive disorders. Gastrin and somatostatin are especially relevant when examining acid regulation, while ghrelin provides a route for studying hunger and energy balance. Comparing these pathways helps researchers relate stomach activity to broader physiological problems.
Ghrelin connects stomach activity with hunger and energy balance, giving biology a way to study communication between digestive signals and the regulation of feeding. Its role is not limited to processing food after a meal. Investigating ghrelin can therefore help place stomach physiology within research on obesity, diabetes, and other conditions involving energy regulation.
The stomach communicates through local and systemic signaling pathways, allowing its hormonal activity to relate to organs beyond the stomach itself. This broader perspective is important because appetite, nutrient processing, and gastrointestinal movement involve coordinated activity across the digestive system. Studying these connections helps explain how stomach hormones participate in whole-body physiological regulation.