OBJECTIVES FOR OSMOSIS
1. Osmosis is the movement of :
(a) solute particles from higher concentration to lower concentration
(b) solvent particles from higher water potential to lower water potential through a semipermeable membrane
(c) solute particles from higher concentration to lower concentration through a semipermeable membrane
(d) solvent particles from lower water potential to higher water potential.
2. The process of osmosis involves :
(a) movement of solvent through a semipermeable membrane
(b) movement of solution through a semipermeable membrane
(c) movement of solute through a semipermeable membrane
(d) none of the above.
3. The phenomenon of uptake of water at the expense of energy by the cell and usually against the osmotic gradient is
known as :
(a) active absorption (b) passive absorption
(c) osmosis (d) diffusion.
4. When the process of diffusion reaches an equilibrium state:
(a) the movement of all molecules stop
(b) molecules continue to move but in equal amounts
(c) a further exchange of molecule ceases
(d) a hypotonic solution is formed
5. The pressure that builds up in plant cells due to osmosis and the strength of the cell walls is called
(a) plasmolysis
(b) hypertonic
(c) cytolysis
(d) turgor
6. A solution that contains a higher level of salts than found in cells is said to be
(a) hypertonic
(c) isotonic
(b) hypotonic
(d) catatonic
7. Movement of substances across the membrane without the use of cellular energy is termed as
(a) active transport
(c) passive transport
(b) carrier transport
(d) the sodium-potassium pump
8. Which of the following statements about the red blood cells in Figure B is true?
(a) These red blood cells have swollen in response to a hypertonic external solution.
(b) These red blood cells have swollen in response to a hypotonic external solution.
(c) These red blood cells have shrunken in response to a hypertonic external solution.
(d) These red blood cells have shrunken in response to a hypotonic external