Question

4. The movement of sodium and potassium ions via sodium channel and potassium channel proteins is

A. Active Process B. Passive process C. Both D. None of the above

5. The Na/K voltage gated channel protein uses __________ to move sodium and potassium across the plasma membrane.

6. The ion, which conduct electricity, is:

a. A charged atom b. a charged molecule c. Both A and B are correct d. none of these are correct

7. In a resting membrane potential, the inside of a cell is ____________, and the cell exterior is _____________.

8. The resting membrane potential, if measured by a voltmeter is ________mV.

9. The area of the neuron that receives the stimulus is ______________.

10. The area of the neuron that transmits the impulse is __________.

11. The dendrite and cell body of the neuron contains the following protein

A. Neurotransmitter receptor B. sodium channel C. Na/K pump D.. all of the above

Answer 1

4. It's both A and B.

Na+ and K+ are moved across the membrane as passive process according to the concentration gradient. But in the sodium potassium pump they are transported against the concentration gradient. So this is an active process.

5. It's ATP. ATP is converted to ADP for their transport and that energy us used.

6. It's ion. So it's a charged atom. atom looses an electron to become a positive ion.

7. In resting membrane potential inside of the cell is -vely charged and outside of the cell is +vely charged. This is due to the presence of more Na+ outside and K+ inside.

8. It's -70mV. It's due to the more amount of Na+ outside the cell and more K+ inside the cell

9. It's the dendrite. Its the starting portion of a neuron. It's the projection of the cell body.

10. It's the axon. It's the elongated structure from an axon. It may be myelinated or not myelinated.

11. It's all the above