When antidiuretic hormone (adh) levels are low a a small volume of concentrated urine is excreted b most of the water reaching the collecting ducts is not reabsorbed c nearly all of the filtered water is reabsorbed d aquaporins are inserted into the princip

option B - most of the water reaching the collecting ducts is not reabsorbed

Explanation:

Anti-diuretic hormone is a hormone secreted by the posterior pituitary gland. It acts on the kidney to regulate fluid and salt balance in the body by the reabsorbtion of useful fluid (water) from urine.

Thus, when antidiuretic hormone (ADH) levels are low most of the water reaching the collecting ducts is NOT reabsorbed, resulting in the passage of LARGE volume of dilute urine.

answer; the correct answer is (beta)

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.