In reabsorption
A) plasma proteins are returned to the blood.
B) excess hydrogen ions are removed from the blood.
C) excess water is passed on to the urine.
D) nutrients and ions are selectively returned to the blood.
E) drugs and foreign substances are passed into the urine.

Question

Quizplus · Accepted Answer

Reabsorption is the process by which nutrients and ions are selectively returned to the blood. The kidneys filter the blood to remove waste products and excess fluid, but they also reabsorb certain substances that are necessary for the body's functioning, such as glucose, amino acids, and electrolytes. This process allows the body to conserve water and maintain the proper balance of chemicals in the blood. Plasma proteins are too large to be filtered by the kidneys, so they are not returned to the blood during reabsorption. Excess hydrogen ions are removed from the blood during tubular secretion, which is a separate process from reabsorption. Excess water can be passed on to the urine if the body has a surplus or if the reabsorption of water is impaired, such as in the case of diabetes insipidus. Drugs and foreign substances may be excreted in the urine, but this is not a function of reabsorption.

In Reabsorption