Osmosis And Diffusion Question Preview (ID: 33060)
Review For Osmosis And Diffusion.
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The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of?
a) proteins
b) lipids
c) phosphates
d) carbohydrates
Diffusion is the movement of molecules from
a) an area of low concentration to an area of high concentration.
b) an area of low concentration to an area of low concentration.
c) an area of high concentration to an area of high concentration.
d) an area of high concentration to an area of low concentration.
Particle transport that requires input of energy from the cell is
a) active transport
b) passive transport
c) communicated transport
d) osmosis
The diffusion of water across a selectively permeable membrane is called
a) osmosis
b) diffusion
c) active transport
d) passive transport
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes
a) water to move into the cell.
b) water to move out of the cell.
c) solutes to move into the cell.
d) solutes to move out of the cell.
Once _______________ is reached, roughly equal numbers of molecules move in either direction across a semipermeable membrane, and there is no further change in concentration on either side of the membrane.
a) equilibrium
b) stability
c) osmosis
d) terminal diffusion
A red blood cell placed in pure water will __________________.
a) shrink
b) swell
c) nothing
d)
Molecules tend to move from an area where they are more concentrated to an area where they are less concentrated. This process is called ____________________.
a) diffusion
b) osmosis
c) transport
d) magic
How do facilitated diffusion and active transport differ?
a) facilitated diffusion uses no energy, active transport requires energy
b) facilitated diffusion uses energy, active transport requires no energy
c) facilitated diffusion is across the membrane, active transport uses proteins
d) facilitated diffusion uses the sun, active transport uses darkness
A hyper-tonic salt solution has a higher concentration of solutes than a blood cell. What happens when a blood cell is placed in a hyper-tonic salt solution?
a) shrivels up
b) blows up
c) lysis (splits)
d) nothing
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