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6 Cards in this Set
- Front
- Back
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where do toxicants exert there effects in the body?
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A) On the surface of cell membrane
B) Within cells C) In spaces between cells |
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All of the following are true statements about cell membranes except:
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A)They are composed of phospholipid molecules.
B)the phosphate "head" is the hydrophillic region C)the lipid tails are found on the inner and outer surfaces of the phospholipid bilayer. (INCORRECT) D)the middle of the phospholipid bilayer is lipophilic E)the phospholipid bilayer forms a semipermeable membrane |
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which transport mechanism relies only on a concentration gradient to enter the cell?
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SIMPLE DIFFUSION
A)active transport B)endocytosis C)phagocytosis D)pinocytosis |
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defined as the ratio of the toxicant's solubility in a nonpolar solvent to its solubility in water?
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PARTITION COEFFICIENT
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diffusion of a toxicant through the epidermis is affected by:
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length of exposure
lipid solubility of toxicant skin location |
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which is not a true statement about the tracheobronchial region of the respiratory system?
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it is composed of trachea, bronchi, bronchioles, and alveoli.
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