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Natural disasters

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silver
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01/27/08 - 12:06 PM

A healthy 20 yr. old man is deprived of water for several days after an earthquake. When he is found, he has an arterial pressure of 118/78mmHg and plasma concentration of ADH 5 times above normal. Which of the following is the most likely explanation for the increase in ADH concentration?

A. Decreased plasma aldosterone

B. Decreased plasma renin activity

C. Increased ECF volume

D. Increased left atrial pressure

E. Increased plasma osmolarity

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Tiff
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01/27/08 - 12:47 PM

E. Increased plasma osmolarity

new_n_lost
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01/27/08 - 01:19 PM

E. Increased plasma osmolarity

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silver
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01/28/08 - 08:58 AM

new_n_lost wrote:
E. Increased plasma osmolarity

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Ig F
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02/27/08 - 05:22 PM

E...increased plasma osmolarity will lead to the increase in ADH levels which will increase water reabsorption in the collecting ducts normalizing plasma osmolarity...

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