dense granule

biochemistry

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Last updated

June 25, 2026

Quick Summary

Dense granules are found within platelets and contain important chemicals like calcium ions and adenosine diphosphate (ADP). When a platelet is activated, these granules release their contents, which play a role in platelet function and the process of blood clotting. ADP, for instance, stimulates other platelets to become active.1

Paneth cells, found in the lining of the small intestine and appendix, also contain secretory granules. These granules are rich in proteins and may contain enzymes like peptidase, which aids in nutrient assimilation, and lysozyme, which has antibacterial properties. The exact function of Paneth cells and how they release their granules is still being studied.2

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bleeding and blood clotting
Platelets and their aggregation
…granules: the alpha granules, the dense granules, and the lysosomes. Each of these granules is rich in certain chemicals that have an important role in platelet function. For example, dense granules contain large quantities of calcium ions and adenosine diphosphate (ADP). Upon release from the platelet, ADP stimulates other platelets…
Read More
…granules: the alpha granules, the dense granules, and the lysosomes. Each of these granules is rich in certain chemicals that have an important role in platelet function. For example, dense granules contain large quantities of calcium ions and adenosine diphosphate (ADP). Upon release from the platelet, ADP stimulates other platelets…
Read More