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Fig. 3. Effects of exogenous glucose on twitch force (F). During the 60
min equilibration period, ventricle strips were incubated in the absence of
any exogenous substrate. In sexually maturing males, F increased
during the experimental period with 5 mmol l-1 glucose present,
compared with 0, 1, 2 and 10 mmol l-1 glucose, and was higher than
that in immature males and females at all concentrations tested. F
was also higher in immature males at 5 mmol l-1 glucose compared
with females and at all concentrations tested. In females, 5 mmol
l-1 glucose increased F compared with 0, 1 and 10 mmol
l-1 values. *P<0.05. Values are means
± s.e.m. (N=8-26 strips per group).