Final answer:
The distal convoluted tubule secretes hydrogen ions, potassium ions, creatinine, and drugs like penicillin to regulate the body's electrolyte and acid-base balance. option e is correct
Step-by-step explanation:
option e is correct The substances secreted by the distal convoluted tubule (DCT) include hydrogen ions (H+), potassium ions (K+), creatinine, and some drugs like penicillin. The DCT is involved in maintaining the body's electrolyte and acid-base balance by selectively secreting and reabsorbing different ions. Not only does it help regulate blood pH, but it also manipulates the content of the urine by secreting certain substances into the filtrate.
The substances secreted by the distal convoluted tubule include hydrogen ions (H+), penicillin, creatinine, and potassium ions (K+). These substances are added to the filtrate in the tubule through a process called secretion. Reabsorption and secretion in the distal convoluted tubule are regulated by endocrine hormones that maintain homeostasis of water and mineral salts in the blood.