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19 Cards in this Set
- Front
- Back
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Passive transport |
The movement of biomolecules across cell membrane. |
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Diffusion |
The movement of molecules from an area of higher concentration to a lower concentration and requires no energy
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Osmosis
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Transport of water ..
Water goes from the higher concentration to the lower concentration |
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Hypotonic |
The concentration of molecules inside the cell are higher than the concentration of solutes outside the cell |
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Hypertonic |
The concentration of solute molecules outside the cell are higher than the concentration of solutes inside of the cell. |
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Isotonic
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The concentration of solutes outside and inside the cell are equal |
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Concentration gradient |
A difference in the concentration of a substance across a distance
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Equilibrium |
A state that exists when the concentration of a substance is the same throughout a space |
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Contractile vacuole |
In protists , an organelle that accumulates water and then releases it periodically to maintain osmotic pressure |
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Facilitated diffusion |
The transport of substances through a cell membrane along concentration gradient with the aid of carrier proteins. |
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carrier protein |
a protein that transports substances across the cell membrane. |
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ion channel |
a complex of complex molecules in the membrane that form when electrons are transfered from one atom to another. |
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active transport |
the movement of chemical substances usually across the cell membrane, against a concentration gradient and requires cells to use energy. |
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sodium potassium pump |
a carrier protein that uses ATP to actively transport sodium ions out of the cell and potassium ions in the cell. |
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endocytosis |
the process by which a cell membrane surrounds a particle and encloses the particle into the cell |
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phagocytosis |
the process by which a living cell engulfs large particles or whole cells, either as a defense mechanism or as a means to obtain food. |
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VESICLE |
a small cavity or sac that contains materials in a eukaryotic cell: forms when a part of the cell membrane surrounds the materials to be taken into the cell or transported within the cell |
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PHAGOCYTE |
a cell that ingests and destroys foregin matter or microorganisms |
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EXOCYTOSIS |
the process by which a substance is released from the cell through a vesicle that transports the substance to the cell membrane to let the substance out |
