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Unformatted text preview: erted into cell
membrane! become part of it. Fig. 2-14 3 general fates:
1. Some vesicles
ﬁlled w/ digestive enzymes
(made on Rough ER, mod.
in Golgi). become LYSOSOMES.
2. Secretory granule, fuses to
cell membrane, EXOCYTOSIS Cells of pancreas
for secretion. Lumen! undergo exocytosis
into lumen of gut lumen carries to
gut where these
enzymes help digest
food. basophilia acidophilia Highly secretory pancreas cells: in clusters (LM, left) or one cell (TEM at right)
RER makes those areas of cytoplasm basophilic (affinity for hematoxylin) as seen in the
light microscope. The secretory granules filled with protein to be secreted from the cell are
acidophilic and accumulate in one end of the cell before undergoing exocytosis
specifically into the space of a very small lumen outside the cells. Filled with digestive enzymes, lysosomes are responsible for (1) intracellular digestion of
phagocytosed material, (2) removal of excess organelles (autophagy), or in some cells
(3) exocytotic release of di...
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This document was uploaded on 02/04/2014.
- Spring '14