Ultrastructure of Glands 27 



whatsoever in the e.r. or mitochondria of the pancreas after starva- 

 tion or pilocarpine administration. It should be remembered, how- 

 ever, that pilocarpine is not always a very effective stimulator of 

 acinar secretion. Daly and Mirsky (1952-3) found feeding to be a 



Fig. 2.1 i. (a) Section through serous cell of rat parotid in the resting state. 



The basal membrane is to the lower left. Note the numerous zymogen granules (zg) and 



rather sparse er. 



much more satisfactory way of depleting the mouse pancreas of 

 enzymes than was pilocarpine. However, Porter (1954) produced 

 complete degranulation of the mouse parotid with pilocarpine, 

 and found a considerable increase in the development of the e.r. to 

 result (Fig. 2.1 1). 



Repeatedly the recent literature on ultrastructure of cells has 



