Exercise 3: Transport and the Plasma Membrane
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It refers to the passive movement of particles from a region of high concentration to a region of low concentration.
diffusion
It refers to the movement of water from a region of low solute concentration (high free water concentration) to a region of high solute concentration (low free water concentration) across a semipermeable membrane.
osmosis
Which organelle refers to the semipermeable membrane that separates the cytosol from the external environment?
plasma membrane
TRUE or FALSE: The plasma membrane consists of a lipid bilayer that allows passive diffusion on non-polar compounds.
True
Give the 3 properties of the plasma membrane.
• self-healing or self-regenerative ability • semi-permeability • fluidity
TRUE or FALSE: Some proteins in the plasma membrane facilitate the transport of ions and polar molecules.
True
In the plasma membrane set-up, what does the water, oil, and alcohol represent?
• water - intracellular environment • oil - plasma membrane • alcohol - extracellular environment
TRUE or FALSE: Heat increases the fluidity of plasma membrane, affecting its permeability as well.
True
It refers to the pigment giving off purple colorations.
anthocyanin
It refers to the process in which the protoplast shrinks and occupies lesser volume compared to the cell wall.
plasmolysis
Which type of solution is formed when 10% NaCl mixes with red blood cells?
hypertonic solution
Which type of solution is formed when distilled water mixes with red blood cells?
hypotonic solution
Which type of solution is formed when 9% NaCl mixes with red blood cells?
isotonic solution