4.3: Osmosis Flashcards
Osmosis
Osmosis is the passage of water from a region where it has a higher water potential to a region where it has a lower water potential through a selectively permeable membrane
A solute
A solute is any substance that is dissolved in a solvent
Water potential is measured in units of what?
Water potential is measured in units of pressure
Water potential is measured in units of pressure, usually what?
Water potential is measured in units of pressure, usually kiloPascals (kPa)
Water potential is measured in units of pressure, usually kiloPascals (kPa).
Water potential is the pressure created by water molecules.
Under standard conditions of temperature and pressure (25 degrees Celsius and 100 kPa), pure water is said to have a water potential of what?
Under standard conditions of:
1. Temperature
2. Pressure
(25 degrees Celsius and 100 kPa), pure water is said to have a water potential of 0
Water potential is measured in units of pressure, usually kiloPascals (kPa).
Water potential is the pressure created by water molecules.
Under standard conditions of temperature and pressure (25 degrees Celsius and 100 kPa), pure water is said to have a water potential of 0.
The addition of a solute to pure water will do what?
The addition of a solute to pure water will lower its water potential
Water potential is measured in units of pressure, usually kiloPascals (kPa).
Water potential is the pressure created by water molecules.
Under standard conditions of temperature and pressure (25 degrees Celsius and 100 kPa), pure water is said to have a water potential of 0.
The addition of a solute to pure water will lower its water potential.
The water potential of a solution must always be what?
The water potential of a solution must always be less than 0, a negative value
Water potential is measured in units of pressure, usually kiloPascals (kPa).
Water potential is the pressure created by water molecules.
Under standard conditions of temperature and pressure (25 degrees Celsius and 100 kPa), pure water is said to have a water potential of 0.
The addition of a solute to pure water will lower its water potential.
The water potential of a solution must always be less than 0, a negative value.
The more solute that is added (the more concentrated a solution), the what its water potential?
The more solute that is added (the more concentrated a solution), the lower (more negative) its water potential
Water potential is measured in units of pressure, usually kiloPascals (kPa).
Water potential is the pressure created by water molecules.
Under standard conditions of temperature and pressure (25 degrees Celsius and 100 kPa), pure water is said to have a water potential of 0.
The addition of a solute to pure water will lower its water potential.
The water potential of a solution must always be less than 0, a negative value.
The more solute that is added (the more concentrated a solution), the lower (more negative) its water potential.
Water will move by osmosis from a region of higher (less what) water potential to one of lower (more what) water potential?
Water will move by osmosis from a region of:
1. Higher (less negative) water potential
to
2. One of lower (more negative) water potential
One way of finding the water potential of cells or tissues is to place them in a series of solutions of different water potentials.
Where this is no net gain or loss of water from the cells or tissues, the water potential inside the cells or tissues must be what?
Where this is no net gain or loss of water from the cells or tissues, the water potential inside the:
1. Cells
Or,
2. Tissues
must be the same as that of the external solution
While diffusion can be the movement of any molecule, osmosis is the movement of what only?
While diffusion can be the movement of any molecule, osmosis is the movement of water molecules only
All water potential values are what?
All water potential values are negative
All water potential values are negative.
What is the highest water potential?
The highest water potential is 0
All water potential values are negative.
The highest water potential is 0.
Therefore, the lower the water potential, the more what it becomes?
Therefore, the lower the water potential, the more negative it becomes
Animals cells, such as red blood cells, contain a variety of what dissolved in their watery cytoplasm?
Animals cells, such as red blood cells, contain a variety of solutes dissolved in their watery cytoplasm
Animals cells, such as red blood cells, contain a variety of solutes dissolved in their watery cytoplasm.
If a red blood cell is placed in pure water, it will do what?
If a red blood cell is placed in pure water, it will absorb water by osmosis