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Nonpolar substances
________, such as hydrocarbons, CO2, and O2, as well as lipids, are hydrophobic.
land dwelling
Most terrestrial (________) animals 'cells are immersed in an extracellular fluid that is isotonic to the cells.
hydrophobic core
However, the ________ of the membrane prevents ions and polar molecules that are hydrophilic from passing directly through the membrane.
Protein groups
________ are frequently found in long- lasting, specialized patches where they perform similar activities.
Phospholipids
________ 'capacity to create membranes is built into their molecular structure.
Membranes
________ are mostly composed of lipids and proteins, however, carbohydrates play a significant role as well.
mosaic model
The fluid ________, like other models, is always being improved as new research reveals more about membrane structure.
phospholipid bilayer
A(n) ________ can exist as a stable boundary between two aqueous compartments because the molecular arrangement shelters the hydrophobic tails of the phospholipids from water while exposing the hydrophilic heads to the water.
plasma membrane
The ________, like other biological membranes, has selective permeability, which means that certain chemicals may pass it more easily than others.
flexible cell
A cell with ________ walls can not withstand high water absorption or loss.
hydrophobic core
A charged atom or molecule and its surrounding water shell are much less likely to enter the mem's ________.
Phospholipids
________ are the most prevalent lipids in most membranes.
