Another EK 1001 Error Possibly 539

[Spiker]

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The new mineralocorticoid (aldosterone) receptor antagonist eplereone is functioning when a:

I Decrease in blood volume is noted
II decrease in urine potassium is noted
III decrease in urine volume is noted

A I only
B I and II only
C III only
D I, II, III


So Aldosterone is produced when blood volume is low and Blood Na is low (Urine K low) and urine volume is high

So the antagonist should be used when it the opposite condition happens

EK says the answer is B I think they got it backward. Can someone confirm this?

 

[capn jazz]

The question is actually asking how you know that the ald-receptor antagonist is working. If it's working, Ald isn't working, so Na+ isn't being reabsorbed and H2O isn't being reabsorbed, so the blood volume will be decreased from normale, and the urine volume will be increased. Further, Ald works to secrete K+ ions so if ald is being inhibited, there will be a decrease in urine potassium concentration.

Also, EK does have some errors but they are very minimal and mostly they're just weird wording in the question or solution. They're very very rarely outright wrong. You'd be better off not approaching every question with the outlook that EK will probably be wrong because being untrusting of your review book will really just not allow you to learn as much as you can from it. Obviously if an answer doesn't make sense, think it through and ask here, but 99 times out of 100, the problem will be with your understanding and not with the book.

 

[Spiker]

The question is actually asking how you know that the ald-receptor antagonist is working. If it's working, Ald isn't working, so Na+ isn't being reabsorbed and H2O isn't being reabsorbed, so the blood volume will be decreased from normale, and the urine volume will be increased. Further, Ald works to secrete K+ ions so if ald is being inhibited, there will be a decrease in urine potassium concentration.

Also, EK does have some errors but they are very minimal and mostly they're just weird wording in the question or solution. They're very very rarely outright wrong. You'd be better off not approaching every question with the outlook that EK will probably be wrong because being untrusting of your review book will really just not allow you to learn as much as you can from it. Obviously if an answer doesn't make sense, think it through and ask here, but 99 times out of 100, the problem will be with your understanding and not with the book.

I guess then they shouldnt add "when a", which signals something is triggering it, instead asking when x is function then: