If you radioactively labeled antidiuretic hormone (adh), where would you expect to find the radioactivity after the hormone had been allowed to circulate?

The correct answer will be- collecting tubules of kidney

Explanation:

Anit-diuretic hormone or ADH is a vasopressin hormone which leads to the decreased formation of urine. ADH is secreted by posterior pituitary region of the brain in the low concentration of water thus, ADH helps conserve the water in the body.

ADH once secreted from the brain binds the receptors present in the collecting tubules of the kidney where it shows its effect by adding aquaporins in the membrane which allows the reabsorption of water in the membrane.

Thus, collecting tubules of the kidney is the correct answer.

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explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.