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NBME 20 Answers

nbme20/Block 4/Question#43

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Negative nitrogen balance

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submitted by guillo12(18),

Negative nitrogen balance is associated with burns, serious tissue injuries, fevers, hyperthyroidism, wasting diseases, and during periods of fasting. This means that the amount of nitrogen excreted from the body is greater than the amount of nitrogen ingested.

Positive nitrogen balance is associated with periods of growth, hypothyroidism, tissue repair, and pregnancy. This means that the intake of nitrogen into the body is greater than the loss of nitrogen from the body, so there is an increase in the total body pool of protein.

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submitted by strugglebus(69),

You have negative Nitrogen balance in starvation (lack of protein) and positive Nitrogen in muscle building states (i.e. children/athletes)

celeste  Nitrogen Balance = Nitrogen intake - Nitrogen loss +1