Abstract
1) Changes in blood sugar value elicited by intravenous administration of glucose were investigated with 26 young and 33 adult dogs, and were classified into 4 types-exponential type (type I), humped curve type (type II), sigmoid type (type III) and straight line type (type IV).
2) Comparison of young and adult dogs with respect to type frequency showed that the so-called atypical type, types II and IV, was found in higher rate in the former than in the latter.
3) Insulin sensitivity of adult dogs of types I, II and III was investigated, and it was found that insulin sensitivity index for type I was larger than that for types II and III.
