Epithelial tissue Flashcards
What is the arrangement of epithelial tissue?
polyhedral cell with anchoring junction- 1 sheet.
Is epithelial vascular?
no
True or false- epithelial cells cant regenerate.
False
True or false- epithelial cells have receptors
true
What are the types of epithelial tissue?
Lining and glandular
True or False- Lining epithelia is for secretion.
false- glandular is for secretion, lining is for structure.
What are the layers in lining epithelia?
simple= 1 layer Stratified= 2+
What is cell shapes in lining epithelia?
Squamous= exchange, barrier and protection Cuboidal= have microvilli - secretion + absorption Columnar= have cillia/microvilli - secretion + absorption
What are the exceptions of lining epithelium?
Transitional + pseudo-stratified
Simple squamous- where is it found?
air sac of lung, heart, blood vessel and lymphatic vessel
Simple squamous- function?
diffusion and lubrication
Simple cuboidal- where is it found?
ducts of small glands and kidney
Simple cuboidal- function?
secrete and absorb
Simple columnar- where is it found?
ciliated- bronchi, uterine tube and uterus
smooth- digestive tract and bladder
Simple columnar- function?
absorb + secrete mucus and enzymes
pseudo stratified columnar- where is it found?
non-ciliated= ductus defren cilated= trachea
pseudo stratified columnar- function?
secrete mucus
stratified squamous- location?
mouth, esophagus and vagina
stratified squamous- function?
protect
stratified cubodial- function?
protect
stratified cuboidal- location?
glands- sweat, saliva and mammary
stratified columnar- function?
secrete and protect
stratified columnar- location?
male urethra- rare
Transitional epithelium- location?
bladder, urethra and ureter
Transitional epithelium- function?
allow urinary to stretch
True or false- endocrine lack duct
true
true or false- exocrine secrete hormones
false- endocrine do- exocrine secrete sweat, oil and saliva
What are the types of exocrine secretions?
merocrine, apocrine, holocrine
Which of the exocrine secretions is most damaging?
holocrine
What is merocrine secretion?
secretory vesicle- exocytosis. (e.g pancreatic acinar cell)
What is apocrine secretion?
portion is pinched off to apical region (e.g mammary gland and ears)
What is holocrine secretion?
mature cell dies- cell death- apotosis (e.g skin and eyes)
What are two types of exocrine secretion not in the blood?
autocrine and paracrine.
Whats the difference of autocrine and paracrine?
autocrine: same tissue- affect its own cells- self signal
Paracrine: neighbor signal- travel through connective tissue (e.g histamine)
What is categories of exocrine glands?
simple/ compound (branched/ unbranched)
secretory protein tubular, branched, alveoler.
What is simple tubular examples?
intestine glands
What is simple coiled tubular examples?
sweat gland
What is simple branched tubular examples?
gastric, mucus, tongue and duodenum
What is simple alveoler examples?
not found in adult
What is simple branched alveolor examples?
oil glands
What is compound tubular examples?
mucous glands, males reproductive system and testes
What is compound alveolor examples?
mammary gland
What is compound tubuloalveolar examples?
salivary, respiratory passage and pancreas
