Chapter 5 Biology
Frequently, transplanted organs are rejected by the receipients body. How is this reaction related to plasma membranes
Each person has a unique set of carbohydrate chains attached to his or her plasma membranes
the eukaryotic cell has multiple membrane enclosed compartment This evolutionoary innovation provides what advantage to the cell
The different membrane enclosed spaces allow different parts of the cell to perform specific functions
Utah's Great Salt Lake has an average salinity seven times higher than that of the oceans. Very few mutlticellular organisms live in this harsh environment. An example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. These brine shrimp must
actively pump water back into their cells to counter its loss due to osmosis
Overall membranes seem to have a great deal in common, but on closer inspection it is revealed that membrances of different cells have unique properties. What is the primary component of membranes that gives membranes cell specific properties
protiens
When placed in a hypotonic environment where the solute concentration is below that of the cell a houseplant will
remain standing upright
osmosis is often viewed incorrectly as a process driven directly by differences in solute concentration across a selectively permeable membrane. What really drives osmosis
the difference in water concentration across a selectively permeable membrane
what contols the direction of a molecule such as oxygen involved in passive transport
the direction of the oxygen concentration gradient
In an oil based nonpolar environment, phospholids would arrange themselves so that ehy
would stay together but in a reverse orientation with their tals projecting outward
