Fig. 7. The effects of the hormones dexamethasone (DEX) (A), prolactin (PRL) (B) and triiodothyronine (T3) (C) on the amount of phosphatidylcholine secreted as a percentage of basal secretion from alveolar type II cells of 30- and 70-day-old Macropus eugenii. An asterisk indicates a significant increase above basal secretion (P<0.05). A double dagger indicates a significant decrease in agonist-stimulated secretion between 30- and 70-day-old joeys (P<0.05). The sample size of each group is indicated above each column. Values are means ± S.E.M.