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Review quiz 1 - Lectures 1-2

Review quiz 1 - Lectures 1-2 - Review quiz Lectures 1 2...

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Review quiz: Lectures 1 & 2 Choose the most incorrect answer. 1. Membrane potential a. Media with a high dielectric constant provide a stabilizing environment for ions such as Na + and K + . b. The lipid bilayer does not act as a barrier to the passive diffusion of estrogens c. Membrane pumps are involved in equilibrating ion gradients across the lipid bilayer . d. Application of ouabain will lead to a depolarization of the cell. e. The principle of electroneutrality can be violated over very short distances. 2. Membrane potential a. Secondary active transporters do not rely on the generation of an electrical potential across the cell membrane. b. If all transmembrane transport proteins were removed from the lipid bilayer, the bilayer’s ion conductance would decrease dramatically. c. It can be generalized that all animal cells have a high intracellular K + concentration, a low intracellular Na + concentration, and an intracellular Ca 2+ concentration slightly greater than the Na + concentration.
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