Download Plate #7. Rough (or granular) endoplasmic reticulum (from a

Plate #7.
Rough (or granular) endoplasmic reticulum (from a “plasma cell” as is
Plate 1); note 0.5-micron scale at bottom.
Identify and
be able to recognize:
rough (or granular)
endoplasmic reticulum
The entire area seen here consists of rough endoplasmic
reticulum, from an area like that labeled GER in Plate 1 but
at more than twice the magnification. Note again the
extensive network of membranes and the differences
between the spaces around them: on one side of a
membrane are numerous dark dots, the ribosomes (for
instance, at Y); on the other is a lighter area into which
whatever is being produced is released (for instance, at X).
*from Toner, P.G., and K.E. Carr: “Cell Structure,” Williams and Wilkins, Baltimore,
1968. (EM copy on reserve in Life Sciences Library, Jordan Hall A304).