resorptie

Resorptie, in a biological context, is the process by which substances are removed from tissues or extracellular spaces and often returned to the body’s circulation or redistributed within the organism. It involves cellular activity that breaks down material and enables its uptake or reuse. Resorption is frequently contrasted with absorption, which refers to the uptake of substances from the external environment into the body.

In bone biology, resorptie is a key phase of bone remodeling. Osteoclasts break down old or damaged bone matrix, releasing minerals such as calcium and phosphate into the bloodstream. This process is tightly regulated by signaling pathways, including RANKL and osteoprotegerin (OPG), and is influenced by hormonal signals such as parathyroid hormone and calcitonin. An imbalance—excessive resorption or insufficient formation—can lead to conditions like osteoporosis.

Resorptie also occurs in other tissues. In dentistry, dental resorption describes the loss of tooth structure due to osteoclast-like cells, which can occur externally on the root surface or internally within the tooth and may result from trauma or inflammatory processes. In the kidneys and intestines, resorption refers to the reuptake of filtered or digested substances back into the body, such as glucose, amino acids, water, and electrolytes, thereby contributing to homeostasis. In plants, resorption can describe the retrieval of nutrients from aging organs for redistribution.

Understanding resorptie helps explain how organisms remodel tissues, maintain mineral balance, and regulate nutrient use during development, health, and disease.