<p>Yeah, the last question doesn’t make sense at all. (Impossible)</p>
<p>If i had to choose, i would choose: C. AB</p>
<p>Being as O,A-A and O,B-B…that would be an educated guess tho.</p>
<p>And in fact, AB is listed as the answer to that question. haha.</p>
<p>What about the ADH-aldosterone one? I wish I could, like, text phosphorylescence all my bio questions or something, haha. Or maybe Eric Lander/Will Fixsen. They’d definitely know it. :P</p>
<p>ADH is involved in water retention. Aldosterone is involved in salt retention. ADH would increase concentration of Na+ which isn’t desired.</p>
<p>As for the second one it’s probably some typo because that simply isn’t possible. O type crossed with anything can only result in A or B or O.</p>
<p>Why would ADH increase concentration of Na+? Wouldn’t aldosterone increase that by forcing the body to keep more salt? ADH causes the body to keep more water, causing the salt concentration to drop.</p>
<p>Doesn’t aldosterone increase both re/absorption of water and salt?</p>
<p>The secretion of ADH should be triggered as the plasma osmolatity increases due to the concentration of sodium.</p>
<p>Are you sure the question wasn’t ‘decrease’?</p>
<p>Hmm yes maybe they meant K+ plasma levels increase. In that case the question would make more sense…</p>
<p>The 2006 one was surprisingly easy, I had -4</p>
<p>On all 160 problems!?</p>