Flashcards in Lecture 2 - Epithelial Cells Deck (33)
Do epithelial cells have blood supply?
What Is the Basal Lamina?
What is the basement membrane?
Includes Anchoring Fibril (Type VII Collagen)
Type IV collagen is made by ______.
Type III and VII collagen are made by ______.
Connective Tissue Cells
Tight Junction Protein and Function
2. Helps seal the cell, preventing water loss as well as the passage of substances in between the cells
Adherent Junction Protein
Cadherin (interacts in precence of Ca2+) + Catenin + acting-binding protein + actin fillament
Adherent Junction Shape and function
Surrounds the Cell, stability, and help seal the tight junction
Cadherin + Desmoplakin/Plakoglobin + Intermediate filament
Desmosome Shape and Function
Does not encircle, goes through the cell, anchors to intermediate filaments, provides stability to the cell
Gap Junction Protein
Forms hydrophilic pore
Microfilaments go up into microvilli to give support
- Made of actin + connecting fibers
Longer than microvilli
function of stereocilia
Longer/wider than microvili
glandular epithelia orgin
from epithelial layer during fetal development
glandular epithelia function
goblet cell formation
During fetal development, goblet cells differentiate from epithelial cells
Goblet cell function
secrete mucous for intestine and respiratory tracts
Goblet cells, single or multicellular gland?
Endocrine vs Exocrine
Endocrine does not have ducts
Exocrine has ducts
Formation of endo/exocrine glands
During fetal development there is a proliferation and differentiation of epithelial cells into ductal and secretory epithelial cells
Do not break BL/BM
Different Types of Exocrine Gland Structural classifications (simple x4)
2. Branched Tubular
4. Branched Acinar
Different Types of Exocrine Gland Structural classifications (compound x3)
Different Types of exocrine glands (x3)
Most Exocrine Glands
Most proteins do not diffuse across the membrane --> use exocytosis
Apical membrane w/ cytoplasm and lipid droplet pinches off
-can produce large quantities --> mammary gland