Cell Membrane Transport

Secretory vesicles have molecules made within the

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Unformatted text preview: m is pumped out at the cost of energy, but the sodium pumps the proton out as the sodium comes in. Active- Passive Coordination ICF/ECF concentrations differ because of active transport The potassium leak channels allow the membrane potential to form. Osmosis: Movement of Water Across Membranes Inside the cell, the 300 mOsm of solute and 55.2 M of water. Outside the cell (pure water): there is 0 M solute, and 55.5 M water. Water will enter the cell in order to equalize the concentration gradient. Here, the solute (inside and the external sucrose) is too large to cross the membrane. The external environment is more concentrated than the inside, thus the water flows out of the cell. Osmosis vs. Tonicity: Effects on cell size Here wate...
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This document was uploaded on 03/23/2014 for the course BIOL 175 at Georgetown.

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