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Movement Through Cell Membranes | Definitions
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Movement Through Cell Membranes | Definitions
Active Transport
Active transport requires ATP as the substances move in the opposite direction of diffusion and the opposite direction of the concentration gradient.
Diffusion
Diffusion is the movement of gas or liquid molecules from a region of higher concentration to a region of lower concentration.
Hypertonic
The environment of the cytoplasm is less concentrated than its surroundings.
Hypotonic
The environment of the cytoplasm is more concentrated than the solution.
Impermeable Membrane
Impermeable membranes do not allow any substances to pass through them.
Isotonic
The concentration inside the cell is the same as the concentration outside of the cell.
Osmosis
The movement of water molecules from a region of higher water concentration to an area of lower water concentration across a semi-permeable membrane.
Permeable Membrane
Permeable membranes allow all substances to pass through them.
Plasmolysis
This is when the plant cell shrivels and the cell membrane moves away from the cell wall. The plants turgidity is decreased.
Selectively-Permeable Membrane
Some substances can pass through the cell membrane easily while some require energy to pass through it.
Turgor
Turgor is the outward pressure of the liquid in the cytoplasm and vacuole pushing against the cell wall of the plant. This is what makes plants strong.
Osmoregulation
The maintenance of water and salt balance in an organism.
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Active Transport
Active transport requires ATP as the substances move in the opposite direction of diffusion and the opposite direction of the concentration gradient.
Diffusion
Diffusion is the movement of gas or liquid molecules from a region of higher concentration to a region of lower concentration.
Hypertonic
The environment of the cytoplasm is less concentrated than its surroundings.
Hypotonic
The environment of the cytoplasm is more concentrated than the solution.
Impermeable Membrane
Impermeable membranes do not allow any substances to pass through them.
Isotonic
The concentration inside the cell is the same as the concentration outside of the cell.
Osmosis
The movement of water molecules from a region of higher water concentration to an area of lower water concentration across a semi-permeable membrane.
Permeable Membrane
Permeable membranes allow all substances to pass through them.
Plasmolysis
This is when the plant cell shrivels and the cell membrane moves away from the cell wall. The plants turgidity is decreased.
Selectively-Permeable Membrane
Some substances can pass through the cell membrane easily while some require energy to pass through it.
Turgor
Turgor is the outward pressure of the liquid in the cytoplasm and vacuole pushing against the cell wall of the plant. This is what makes plants strong.
Osmoregulation
The maintenance of water and salt balance in an organism.