A 1 Epithelial tissue Flashcards
what is the most common mechanism of secretion; merocrine, apocrine, or holocrine?
merocrine
the mammary glands and axillary sweat glands are examples of which type of secretion?
apocrine secretion
what is an example of a gland that is considered holocrine?
for our purposes…the sebaceous gland.
the submandibular and the sublingual glands secrete mucous, serous, or both?
they secrete both.
compound tubuloacinar gland location?
submandibular gland, mammary gland, and lacrimal gland.
branched acinar gland location?
cardiac part of stomach and general stomach.
simple branched tubular gland location?
pyloris of stomach and general stomach.
compound tubular gland location?
duodenum, submucosal gland.
compound acinar gland location?
pancreas
simple tubular location?
large intestine/colon
simple coiled tubular location?
skin and sweat glands
simple acinar gland location?
urethra, and paraurethral/periurethral glands.
where is the number one place where cancer oringinates? (general)
epithelial cells
what percentage of cancers arise from epithelia?
over 85%
what is a carcinoma?
a tumor of epithelial origin
what is an adenocarcinoma?
a tumor derived from glandular epithelial tissue.
what are the four main components of the basal lamina?
collagen type 4
laminins
entactin
perlican
what is goodpastures syndrome?
an autoimmune disease in which patients make antibodies against their type 4 collagen. results in damage to basal lamina ultimately causing renal failure and pulmonary hemorrhage.
what is the order of cell junctions from apical to basal?
tight junctions (zonula occludens) adherins junctions (zonula adherins) desmosomes (maculea adherins) gap junctions (intercytoplasmic junctions)
what is the functional unit of a gap junction called?
what is it made of?
Connexon = functional unit connexins = protein units
what attaches to the terminal web?
actin filaments
T/F actin is found within the microvilli?
true
where do you find stereocilia?
epididymis, ductus deferens, and hair cells of inner ear
which type of cells have non-motile primary cilia?
almost all cells
where do you find cilia?
CNS, male and female repro, and respiratory system
what do the microtubules of cilia and flagella attach to?
basal body.
what causes polycystic kidney disease?
disruption in the non-motile primary cilia. They are used for fluid sensing.
where do you find simple squamous epithelium?
bowmans capsule/loop of henle
lung
rete testis
lining walls of blood and lymph vessels
where do you find simple cuboidal epithelium?
small ducts of exocrine glands, kidney tubules
where do you find simple columner epithelium?
digestive tract
where do you find ciliated simple columner epithelium?
uterus and uterine tubes
small bronchi of lung
central canal of spinal cord
where do you find non-keratinized stratified squamous epithelium?
mouth, vagina, female urethra, anus, esophagus, epiglottis, and eye
what is the most common type of epithelium?
stratified squamous epithelium
where do you find stratified columner epithelium?
Secretory ducts (large ones) Pharynx Anus Conjunctiva Epiglottis
where do you find stratified cuboidal epithelium?
rare but found in ducts surrounding sweat glands, anorectal junction.
where do you find pseudostratified columnar epithelium?
male urethra
parotid gland
where do you find ciliated pseudostratified columner epithelium?
uterine tubes, respiratory tract, male repro tract.
where do you find transitional epithelium?
bladder, upper urethra, ureters.
what is metaplasia?
a change in a differentiated cell to another differentiated cell, both of which are mature cells. These are non cancers cells.
what is the only unicellular gland in the body?
goblet cell
which type of glands do not have ducts?
endocrine glands
Which types of structures have a 9+2 arrangement?
What about 9+0?
1) cilia and flagella
2) primary cilia
What type of cells do you find on thesoft palate? Hard palate?
Soft palate= ciliated stratified columnar
Hard palate= keratinized stratified squamous
