Figure 4.

Insulin tolerance test performed in Ames dwarf mice after 6 weeks of growth hormone (GH) injections, and in control Ames dwarf and normal animals. (A) One day after the last injection of GH, insulin sensitivity of Ames dwarf mice was decreased to the level measured in normal mice. (B) One month after the last injection, insulin sensitivity of dwarf mice improved and returned to the level measured in control Ames dwarf mice. a, b—values that do not share the same letter in the superscript are significantly different (p < .05).