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Fig. 5. Urinary excretion rates of woodchucks and rabbits before and during
prolonged fasting. (A) Absolute rates of N excretion (N=4 for spring
and summer woochucks, N=9 for rabbits). (B-E) The relative
contributions of urea (B), ammonia (C), creatinine (D) and uric acid (E) to
total N excretion. For relative contributions (% of total N excretion), the
values for spring and summer woodchucks were pooled (N=8 for
woodchucks and 9 for rabbits). Values are means ± S.E.M.
*Significant differences from fed values measured on day 0 within
each group.