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Terms in this set (12)
Diffusion _____.
is a passive process in which molecules move from a region of higher concentration to a region of lower concentration
requires integral proteins in the cell membrane
is very rapid over long distances
requires an expenditure of energy by the cell
is a passive process in which molecules move from a region of higher concentration to a region of lower concentration
Which of the following processes includes all others?
osmosis
passive transport
transport of an ion down its electrochemical gradient
facilitated diffusion
passive transport
Which of the following is true of osmosis?
Osmosis is an energy-demanding
or "active" process.
In osmosis, water moves across a membrane from areas of lower solute concentration to areas of higher solute concentration
In osmosis, solutes move across a membrane from areas of lower water concentration to areas of higher water concentration.
Osmosis only takes place in red blood cells.
in osmosis, water moves across a membrane from areas of lower solute concentration to areas of higher solute concentration
Where is peripheral protein and what is its function?
peripheral protein
Where is cholesterol and what is its function?
cholesterol
Which component is a protein fiber of the extracellular matrix?
A
Which component is a microfilament (actin filament) of the cytoskeleton?
C
Which of the following is true of osmosis?
Osmosis only takes place in red blood cells.
In osmosis, solutes move across a membrane from areas of lower water concentration to areas of higher water concentration.
Osmosis is an energy-demanding or "active" process.
In osmosis, water moves across a membrane from areas of lower
solute concentration to areas of higher solute concentration.
In osmosis, water moves across a membrane from areas of lower solute concentration to areas of higher solute concentration.
A patient was involved a serious accident and lost a large quantity of blood. In an attempt to replenish body fluids, distilled water—equal to the volume of blood lost—is added to the blood directly via one of his veins. What
will be the most probable result of this transfusion?
The patient's red blood cells will swell and possibly burst because the blood has become hypotonic compared to the cells.
The patient's red blood cells will shrivel up because the blood has become hypertonic compared to the cells.
The patient's red blood cells will burst because the blood has become hypertonic compared to the cells.
The patient's red blood cells will shrivel up because the blood has become hypotonic compared
to the cells.
the patient's red blood cells swell and possibly burst because the blood has become hypotonic compared to the cells.
In which of the following would there be the greatest need for osmoregulation?
a red blood cell surrounded by plasma
a salmon moving from a river into an ocean
a plant being grown hydroponically in a watery mixture of designated nutrients
an animal connective tissue
cell bathed in isotonic body fluid
reptile moving from river into the ocean
The voltage across a membrane is called the _____.
chemical gradient
membrane potential
osmotic potential
electrochemical gradient
membrane potential
The force driving simple diffusion is _____, while the energy source for active
transport is _____.
the concentration gradient; ATP
the concentration gradient; ADP
transmembrane pumps; electron transport
phosphorylated protein carriers; ATP
the concentration gradient; ATP
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