Epithelium Flashcards
What are the types of simple epithelium?
Simple cuboidal
Simple Columnar
Simple squamous
Pseudo Stratified
What are the primary functions of simple squamous cells?
Ion/Gas exchange, diffusion, and absorption
What are the primary functions of simple cuboidal and columnar?
Secretion/absorption
What are the types of stratitified cells?
Stratified squamous (ketatinized or non) Stratified columnar (rare) Stratified Cuboidal (rare) Transitional
What are components of the basal lamina?
- Type IV Collagen
- Large sticky molecules such as laminin and entactin
- Large molecules which bind components to each other, to membrane, and to CT
- Proteoglycans which filter by charge
What is the primary component of Reticular Lamina?
Type III Collagen
What type of staining is used to ID carbohydrates?
Periodic acid-Schiff (PAS)
Differentiate Cilia vs microfilaments
Cilia:
- Motile
- Axoneme
- Microtubules
Microvilli:
- Nonmotile
- INC SA
- Anchored to terminal Bar
What are the different cellular junctional complexes?
- Adherens
- Occludens (tight junctions)
- Desmosomes (Macula adherens: Cell-Cell)
- Hemidesmosomes (Macula adherens cell-basal lamina)
Differentiate Macula vs Zonula
Zonula (belt) - All around cell
Macula (“spot”) - only at certain spots on the cell
Differentiate endocrine vs exocrine
Endocrine - Excrete to basal side to blood
Exocrine - Excrete to apical surface
What are the three classifications of ducts by secretion?
Merocrine - No loss of apical cytoplasm
Apocrine - Some loss
Holocrine- Whole cell loss
Differentiate Simple vs compound duct.
Simple - Single duct (non secreting cell pathway)
Compound - More than one duct
What are the different shapes for glands?
Simple Tubular Coiled Tubular Branched simple tubular Simple Acinar Alveolar Simple branched Alveolar
Characterize the two types of secretions from glands
Serous - Watery, Protein-rich
Mucous - Slimy, viscous, high glycoproteins
