Glandular Epithelium Flashcards
Steps of development of exocrine and endocrine glands?
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What are the 3 types of exocrine secretion?
What are the 3 types of endocrine secretion?
What is the difference between paracrine and autocrine signaling?
Exocrine: merocrine - membrane bound vesicles that exit through exocytosis MOST COMMON…. aprocrine - product buds off and released with thin layer of cytoplasm…. holocrine - membrane ruptures and releases secretion and cell debris
Endcrine: secretes hormones into blood vessels via CT
Paracrine signaling impacts surrounding cells
Autocrine signalling impacts the same cell that secreted
What is a common unicellular exocrine gland we will see? What are two regions of the goblet cell to know?
Goblet cells
Golgi zone in middle area of cell
Theca which is expanded apical region of cell
b = Base
BM = Basal membrane
GC = Goblet cell
GZ = Golgi zone
L = Lumen
m = Mucin
rN = Round nucleus of a lymphocyte
T = Theca
Arrowhead = Brush border
Look at the picture of the multicellular exocrine gland types. note which are associated with what area of the body.
Simple tubular gland
= Intestinal glands
Simple branched tubular
= Gastric glands
Simple coiled tubular
= Sweat glands
Simple branched acinar
= Sebaceous glands
Compound tubular
= Brunner’s glands
Compound acinar
= Mammary glands
Compound tubuloacinar
= Salivary glands
What gland structure is this? Where is this found? What are some notable cells?
Simple tubular
colon
goblet cells
What gland structure is this? What type of gland is this?
Simple coiled tubular
sweat gland
What type of gland structure is this?
Simple coiled tubular
Swat gland
AC = Adipose cell
D = duct
MC = Myoepithelial cell
S = secretory portion
Arrows = Small blood vessels
What type of gland structure is this? What type of gland is this?
Simple branched acinar
sebaceous gland
What gland structure is this? What gland is this?
Simple branched acinar
Sebaceous gland
What gland structure is this? What gland is this?
Compound acinar
Mammary gland
What type of gland structure is this, what gland is this? What are those granules?
Compound tubuloacinar
acini of pancreas
zymogen granules
CT = Connective tissue
L = Lumen
N = Nucleus
ZG = Zymogen granules
What type of gland is this? What structure is it?
Compound tubuloacinar
salivary gland (mixed seromucous gland)
L = Lumen
N = Nuclei
SD = Serous demilunes
Arrows = Plasma membranes
What is this an example of? What is this a specimen of and what type of stain?
Endocrine gland
Thyroid gland follicles
Massons trichrome stain
What is this a specimen of? Why is it special?
This shows both exocrine and endocrine portions of the pancreas
endocrine islet of langerhans (big circle) and exocrine are the serous acini (small darker circles around islet)
