though the difference of the cellular and mitochondrial volume is probably related to the age difference between the two groups , the findings on golgi apparatus , plasma membranes and lysosomes suggest that the secretory activity or at least the potency for the secretion of parathyroid hormone was higher in pt glands of the 6-day-old dogs than in the 5-month-old dogs .
C0007634
cellular
C0007603
plasma membranes