Epithelium: Junctions and Transport - Specializations and Cellular Mechanisms

Explore epithelial specializations, focusing on membrane junctions and cellular transport in this 21-minute tutorial. Delve into critical examples from the intestine and respiratory system, including the CFTR gene and cystic fibrosis. Learn about epithelial cell properties, membrane movement control, apical surface modifications, and various junction types. Examine transcellular transport mechanisms, including molecule and fluid membrane passage. Gain insights into the CFTR's role in fluid export within the respiratory system. Benefit from a comprehensive review of junctions and their functions in epithelial tissues.

Intro
What properties do epithelial cells need to have
How do epithelial cells control movement across membranes?
Apical surfaces of cells can have modifications
Tight/occluding junctions form seals between adjacent cells
Gap junctions are essential conduits for intercellular communication, synchrony, and metabolic cooperation
Review of Junctions
Transcellular transport
How do molecules pass membranes?
How do fluids pass membranes
CFTR and fluid export in the respiratory system