BIOL 1001 Chapter : Chapter 5
Document Summary
Chapter 5: cell membranes isolate cell contents while allowing communication with the environment, functions of the plasma membrane: Isolates the cell"s contents from the external environment. Regulates the exchange of essential substances: things that need to get into the cell, cell needs to keep stuff out but also allowing things to get in. 5. 3 how do specialized junctions allow cells to connect and communicate: gap junctions and plasmodesmata allow direct communication between cells, cell-to-cell protein channels allowing for passage of hormones, nutrients, and ions in animal cells are gap junctions. Clicker questions: a group of cells are placed in a vial of freshwater, water will move out of the cell, the higher concentration is outside of the cell. Includes osmosis: includes facilitated diffusion: the cell requires channel grooves, proteins that help move them, does not require transport protein, requires channel proteins, does occur across phospholipid bilayer, active transport.
