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Ch. 40 - Water and Electrolyte Balance in Animals
All textbooksFreeman 8th EditionCh. 40 - Water and Electrolyte Balance in AnimalsProblem 9
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Chapter 39, Problem 9

Biologists have been able to produce mice that lack functioning genes for aquaporins. How would the urine of these mice compare to that of mice with normal aquaporins? a. lower volume and lower osmolarity b. lower volume and higher osmolarity c. higher volume and lower osmolarity d. higher volume and higher osmolarity

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Hey everyone let's take a look at this question together. Inhibition of anti diuretic hormone A th in humans results in the production of a blank of urine. So let's think back to what we've learned about A. D. H. We know that A. D. H. Is the hormone that tells the kidneys to release less water or hold the water. And so because they hold more water it also decreases the amount of urine produced. So it decreases that urine production. And so because of this when we have an inhibition of A. D. H. Or a lack of a th because blocking it would mean that we have less of the hormone being used that leads to the opposite of its role in the body. So a lack of A. D. H. Leads to less re absorption or basically instead of holding that water we're releasing more water. So because we have more water being released and we have more urine being produced, that higher content of water leads to a more diluted urine produced. And because we have more urine and more water we also have a larger volume being produced as well. Because instead of holding that water that the A. D. H. Is meant for we are releasing more water and increasing the urine production. So the opposite of the purpose of a th so we have a larger volume being produced and we have more diluted urine. So that means that answer choice B large volume and diluted is the correct answer bac because the purpose of A. D. H. Is to hold water and decrease urine. And because we're blocking that use of A. D. H. We're doing the opposite. So we're releasing more water and an increase in urine production. And because of the more water it's more diluted. So we have a larger volume of diluted urine that is being produced. I hope you found this video to be helpful. Thank you and goodbye.
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