A scientist stimulates an axon two times within fifteen milliseconds. When measuring voltage changes on the other end of the axon, they only see one action potential. Why does this happen? 1. The membrane does not have enough time to return to its resting potential, and so no action potential can be initiated.

2. Voltage-gated Na+ channels are still inactivated after the first action potential, and so a second action potential can not be initiated.

3. Na+/K+ pumps are actively pumping Na+ out of the axon, which prevents the axon from reaching threshold.

4. Voltage-gated K+ channels are opposing the flow of current from the electrode, preventing the axon from reaching threshold.

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the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy

the answer is admiramos

the rule for verbs is whoever you are referring to (in this case 'nosotros'), you need to change the ending of the word.

nosotros - amos

yo - o

tu - as

el, ella, usted - a

ellos, ellas, ustedes - an

(examples: nosotros bailamos (instead of bailar) or yo hablo (instead of habla)

after a the power stroke, adp is released, but the cross-bridge formed is still in place. atp then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.