Compare the methods of gas exchange in adult amphibians to gas exchange in reptiles.

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Explanation:

sample response:Adult amphibians have lungs for gas exchange. However, gas exchange may also occur through the skin and lining of the mouth. Because their skin is dry and scaly, reptiles cannot exchange gases through their skin. They breathe entirely with lungs.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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