6.-CELL-MODIFICATIONS.pdf

CELL MODIFICATIONS LEARNING OBJECTIVES  Define cell modification  Enumerate and describe the three types of cell modification  Characterize apical, basal and lateral cell modifications  WHAT IS cell modification?  Are specialized or modification re-acquired by th...

CELL MODIFICATIONS LEARNING OBJECTIVES  Define cell modification  Enumerate and describe the three types of cell modification  Characterize apical, basal and lateral cell modifications  WHAT IS cell modification?  Are specialized or modification re-acquired by the cell after cell division that helps the cell in different beneficial ways TYPES OF CELL MODIFICATIONS  APICAL MODIFICATION  BASAL MODIFICATION  LATERAL MODIFICATION  WHAT IS APICAL modification?  Cell modification found on the apical surface of the epithelial cells  It facilitate movement of substances on the epithelial surface or to increase the surface area of the epithelial lining. TYPES OF APICAL MODIFICATION  CILIA  MICROVILLI  WHAT IS cilia?  Cilia are tiny hair-like structures on the surface of cells in many parts of the body, including the lungs. When they are functioning correctly, cilia beat together in a wave-like motion to move mucus, germs and other foreign particles up toward the mouth where they can be coughed or sneezed out.  WHAT IS microvilli?  Microvilli are tiny finger-like projections found on the surface of certain cells. Their purpose is to increase the surface area of the cell's apical surface, resulting in more effective absorption or secretion of substances.  WHAT IS basal modification?  Basal modification is a specialized cell structure found on the basal surface of epithelial cells.  Basal modification functions to provide structural support to the epithelium and acts as a selective barrier between the epithelium and supporting tissue.  WHAT IS LATERAL MODIFICATION?  Cell modification found on the basal surface of the cell  Lateral modifications regulate movement between cells and allow cell-to-cell communication.