This preview shows page 1. Sign up to view the full content.
Unformatted text preview: ollagen, pretty
much act as SUPPORT for the parenchyma. CAPSULE of a gland is even
thicker and surrounds the gland -- acts as boundary -- SEPTA subdivide
the gland. Structural classes of exocrine glands
branched, but they all empty into
a SINGLE duct. with unbranched ducts with branched ducts Table 4-4 Three types or mechanisms of secretion (concept more useful
than the morphological classification of glands) Three diff modes of secretion in exocrine glands! This is an ex. of terminal
differentiation -- NOT apoptosis -technically it's "programmed"
cell death but it's NOT the same! Also fairly rare,
mostly seen in
gland. Involved in
of the skin! Fairly
rare. pdt is usually OIL. Merocrine secretions, merocrine glands. Involve process of
EXOCYTOSIS. When material inside secretory vesicles fuse
with cell membrane and release pdt outside the cell. Merocrine
glands are specialized for this type of secretion! Holocrine secretion -- secretory cells themselves in the
acini differentiated from a basal region to a more apical
region in these statiﬁed epithelium -- as they differentiate,
the undergo TERMINAL differentiation -- become ﬁlled
with pdt, lose nuclei & organelles, becomes non-fxnal,
View Full Document
This document was uploaded on 02/04/2014.
- Spring '14