Respuesta :
Answer:
Option D, bilirubin comes from the destruction of aged red blood cells
Explanation:
Bilirubin is a yellowish pigment and waste product produced when the heme in older red blood cells that have reached the end of their lifespan, having circulated their allowance of oxygen molecules, are metabolized by the liver and marked for elimination via the bile that is present in the feces and or the urine. If not eliminated, that bile is concentrated in the gallbladder and aids in the metabolism of fatty acids. Higher levels of bilirubin in the blood can indicate that the liver may be damaged and manifest as the patient appearing jaundiced, their skin, palms, and the sclera of their eyes may have a yellow hue.
In short, bilirubin comes from the destruction of aged red blood cells, option D.
Final answer:
Bilirubin originates from the breakdown of aged red blood cells. It is processed in the liver, made water-soluble, and excreted via bile into the intestine, where it's further metabolized into urobilin and stercobilin, affecting the color of urine and feces respectively.Therefore, the correct answer is option D. Bilirubin comes from the destruction of aged red blood cells.
Explanation:
The nurse should respond that bilirubin comes from the destruction of aged red blood cells. Bilirubin is a yellow breakdown product of normal heme catabolism, which occurs as the body clears out old or damaged red blood cells that contain hemoglobin. In the spleen, these red blood cells are broken down, and bilirubin is formed from the heme portion of hemoglobin.
Once formed, bilirubin is transported to the liver. In the liver, bilirubin combines with albumin to form a complex that is then taken up by the liver. Here, bilirubin is conjugated to make it water-soluble and is subsequently excreted into the bile. Bacteria in the intestine convert bilirubin to urobilinogens, some of which is reabsorbed and excreted in the urine as urobilin (giving urine its yellow color), while the remainder is converted to stercobilinogen and then to stercobilin, which gives feces its brown color.
