7 functions of epithelium
Establish boundaries, protection, absorption, filtration, secretion, excretion, and sensory reception.
what is under epithelium?
what is the basal lamina
noncellular sheet of glycoproteins
what is the reticular lamina
extracellular network of collagen
what does the reticular lamina do
adds strength to the connection between epithelium and connective tissue.
what does the basal lamina do
functions as a selective filter.
what makes up the basement membrane of epithelium
basal lamina and reticular lamina
what is simple epithelium involved in
absorption and filtration
where is pseudostratified epi found
places w limited movement like the respiratory tract
how is epithelium named
by the shape on the apical surface
type of epi that can change its shape
what does transitional epi help with
do secretions require energy
secrete into a duct
example of exocrine glands
sweat glands, gallbladder, and pancreas, and salivary glands.
duct less gland
most of the secretions from this gland go into the blood
example of an endocrine gland
cells stay attached in the release of hormones in this type of gland
examples of merocrine glands (3)
pancreas, salivary glands, and sweat glands
cell accumulates material and secretes it via exocytosis
cell accumulates stuff and then breaks away, and then the cell ruptures, releasing all of it contents
example of holocrine glands
oil and sebaceous glands
has to create new cells via mitosis
what is the embryonic tissue that connective tissue comes from
what are the 3 structural elements found in connective tissue
ground substance, fibers, and cells
which type of fibers allow for stretching
which type of fibers allows for networking
what makes up the ground substance (3)
interstitial fluids, adhesion proteins, and proteoglycans
striated, voluntary, and multinucleated
involuntary, single nucleated, and striated
no striations and uninucleated
how are muscle tissues classified
striations, voluntary or involuntary, and number of nuclei
carry the nervous signals
often involved in absorption
simple cuboidal epithelium
often involved in filtration/diffusion
simple squamous epithelium
are goblet cells an endocrine or exocrine gland?
what is secreted by goblet cells?
all cells are in contact with the basement membrane
what is on top…reticular or basal lamina
basal lamina (glycoproteins)