Term
| Presents a permeability barrier to certain substances but not to others |
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Definition
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Term
| Allows a cell to control its intracellular environment to some extent |
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Definition
| Lipid core (permeable barrier) |
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Term
| An asymmetrical distribution indicates some form of: |
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Definition
| concentrating or extruding mechanism |
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Term
| O2, CO2, N2, Benzene are examples of: |
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Definition
| small hydrophobic molecules |
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Term
| H20, Glycerol, ethanol are examples of: |
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Definition
| Small uncharged polar molecules |
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Term
| Amino acids, glucose, nucleosides are examples of: |
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Definition
| Larger uncharged polar molecules |
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Term
| H+, NA+, HCO3-, K+, Ca2+, Cl-, and Mg2+ are examples are: |
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Definition
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Term
| Is the movement of a substance from an area of high concentration to low this is energetically favorable |
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Definition
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Term
| Is the movement of a substance from an area of ____concentration to ____ this is energetically favorable |
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Definition
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Term
| Diffusion can occur in what phases: |
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Definition
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Term
| In water-based biological systems diffusion is _____ but the path is convoluted as substances collide frequently |
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Definition
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Term
| Diffusion is effective over ____ distances |
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Definition
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Term
| Diffustion time _____ by the square of the distance but ___ with increased area |
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Definition
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Term
| Diffusion time _____ the greater the concentration difference |
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Definition
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Term
| Diffusion is more rapid the ____ the substances |
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Definition
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Term
| Diffusion is due to ____ energy and therefore ____ as temperature increases |
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Definition
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Term
| The cell _____ in hypotonic solutions |
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Definition
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Term
| The cell _____ in isotonic solutions |
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Definition
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Term
| The cell _____ in hypertonic solutions |
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Definition
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Term
| When a concentration difference occurs across a membrane but the substance/solute is impermeable water will move in the _____ in an attempt to equalize the concentrations...this is known as: |
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Definition
| opposite duration ---> osmosis |
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Term
| Osmotic pressure depends on the number of ______ |
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Definition
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Term
| A molar solution of a substance that does not dissociate exerts an osmotic pressure of _____ |
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Definition
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Term
| Dissociation into two ions _____ the osmotic pressure |
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Definition
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Term
| Movement between cells can be affected by the presence of: |
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Definition
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Term
| The _______ of bodily fluids including _____ is strictly regulated |
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Definition
| osmotic pressure ----cytoplasm |
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Term
| will move water out of cells and cause them to shrink |
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Definition
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Term
| Will move water into cells and cause them to cell or even burst/lyse |
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Definition
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Term
| We do not have ____ like plants to prevent hypotonic solutions |
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Definition
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Term
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Definition
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Term
| the ____ perform the task of equalizing the osmotic pressure |
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Definition
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Term
| Because of water's permeability it cannot be directly pump/transported but must follow changes in osmotic pressure, meaning that typically ____ is pumped and water follows |
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Definition
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Term
| Proteins exerts _____ and this can be a significant factor especially in fluid exchange in capillaries |
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Definition
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Term
| forces water out of capillaries but the oncotic pressure of the plasma proteins draws water back typically resulting in very little net fluid loss to the tissues |
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Definition
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Term
| non-permeable solutes require a ____ to cross plasma membranes |
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Definition
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Term
| If you go against the gradient it requires: |
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Definition
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Term
| The two types of diffusions: |
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Definition
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Term
| The type of transport that required energy |
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Definition
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Term
| Doesn't require energy however requires protein carrier |
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Definition
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Term
| Form aqueous channels that allow ions to flow down their electrochemical gradients through a hydrophilic "pore" transport pump |
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Definition
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Term
| binds solutes on either side of the membrane and then change conformation so transferring the solute to the other side |
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Definition
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Term
| If the cell interior is negative relative to the surrounding IF/ECF it will: |
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Definition
| enhance the flow of positive ions but repel the flow of negative ions |
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Term
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Definition
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Term
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Definition
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Term
| depends on concentration differences and the electrical potential across the membrane |
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Definition
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Term
| If no energy is required the solute diffuses: |
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Definition
| down the concentration gradient |
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Term
| If the flow is against the concentration or electrochemical gradient it is termed ____ and requires _____ |
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Definition
| active transport----Requires ATP |
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Term
| If a passive transport of one solute is linke to the transport of another solute it is said to be ______ |
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Definition
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Term
| If an active ingredient of one solute is linked to the transport of another solute it is called: |
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Definition
| secondary active transport |
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Term
| Transport of a substance in one direction is termed: |
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Definition
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Term
| Transport of two or more substances in the same directed is termed: |
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Definition
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Term
| Transport of two or more substances in opposite directions is termed: |
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Definition
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Term
| If electrical neutrality is maintained by either transporting equivalent positive and negative ions or exchanging ions with the same charge only the ______ matters. |
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Definition
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Term
| transport that required energy |
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Definition
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