Question

Объясните, что такое реабсорбция?​

Answer 1

Ответ:

Реабсорбция — обратное всасывание жидкости из полостей и полых анатомических структур организма. Термин часто употребляется для характеристики процессов, протекающих в выделительной системе животных во II фазу мочеобразования.

Надеюсь что помогла)

Answer 2

What is Reabsorption?

Reabsorption refers to the process by which substances, such as ions, water, and nutrients, are taken back into the bloodstream from the filtrate in the renal tubules of the kidneys. It is an essential step in the formation of urine and plays a crucial role in maintaining the body's fluid balance and regulating the concentration of various substances in the blood.

How Does Reabsorption Occur?

Reabsorption primarily occurs in the renal tubules, which are part of the nephrons, the functional units of the kidneys. The renal tubules are responsible for filtering the blood and producing urine.

During the process of filtration, blood is initially filtered in the glomerulus, a network of capillaries in the nephron. The filtrate, which contains waste products, excess ions, and water, then enters the renal tubules.

Reabsorption takes place as the filtrate flows through the renal tubules. The walls of the tubules are lined with specialized cells that actively transport certain substances back into the bloodstream. These substances include ions like sodium (Na+), potassium (K+), calcium (Ca2+), and nutrients such as glucose and amino acids. Water is also reabsorbed through osmosis.

The reabsorption process is highly selective, meaning that specific substances are actively transported or passively diffused back into the bloodstream, while others are left in the tubules to be excreted as urine.

Importance of Reabsorption

Reabsorption is a vital process for maintaining the body's homeostasis. It allows the kidneys to regulate the concentration of various substances in the blood, including electrolytes, water, and nutrients.

By reabsorbing essential substances, the kidneys help prevent excessive loss of water and nutrients from the body. This is crucial for maintaining proper hydration, electrolyte balance, and overall metabolic function.

Additionally, reabsorption plays a role in the reabsorption of filtered substances that the body needs to retain, such as glucose. This ensures that valuable nutrients are not wasted and are returned to the bloodstream for use by the body's cells.

Conclusion

In summary, reabsorption is the process by which substances are transported from the renal tubules back into the bloodstream. It is a selective process that helps maintain the body's fluid balance, regulate the concentration of various substances in the blood, and prevent excessive loss of essential nutrients and water.