Question

Which of the following can be present in the proximal convoluted tubule in amphibians' nephrons?

a. Sodium
b. Amino acids
c. Chloride
d. Both a and c
e. All of the above

Answer 1

All substances listed, including sodium, amino acids, and chloride, can be present in the proximal convoluted tubule of amphibians' nephrons.

Step-by-step explanation:

In the proximal convoluted tubule of amphibians' nephrons, several substances can be present for reabsorption or secretion. The correct answer to what can be present in the proximal convoluted tubule is e. All of the above, which includes sodium, amino acids, and chloride. These substances are important for maintaining electrolyte balance and recovering valuable nutrients that were initially filtered out of the blood by the glomerulus.