6. Based on this hypothesis, draw how would a membrane conductance plot of this TTX-poisoned neuron look during an applied voltage. eN6 УК Vm Another neurotoxin is tetraethylammonia (TEA). Although not generally produced by any biological systems, it has been used in the past as a drug for hypertension and to assess capacity for vasodilation. To the right is a plot of the membrane potential of an action potential in a neuron treated with TEA 7. Based on what you know of action potentials, hypothesize specifically what TEA did to this cell to cause this reaction. (mV) 40 0 Potential Membrane -40 -80 0.0 0.2 0.4 0.6 Time 0.8 1.0

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.