ENDOCRINOLOGY OF TRANSPORT 



i 



y 







f^mtm* 



J<£* £ 



it, v 



Figure 31 Electron micrograph of portions of the cytoplasm of 

 two adjacent adipose cells which had been incubated in a bicarbonate 

 medium containing glucose, gelatin, and insulin (4 mg, 2 mg, and 10 3 

 microunits per ml, respectively). The arrows indicate what are described 

 as numerous infoldings of the plasma membrane, as well as small vesicles. 

 Magnification, X37,000. [From Barrnett, R. J., and Ball, E. G. (1960), 

 /. Biophys. Bioche?n. Cytol., 8, 91; with permission.'] 



IOI 



