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MCQ – 86489

Question

Which of the following is the correct order for the marked ones in the graph given below?

A.

1. Absolute Refractory period, 2. Relative Refractory period, 3. Action Potential, 4. Threshold Potential, 5. Na+ Conductance & 6. K+ Conductance 

B.

1. Relative Refractory period, 2. Absolute Refractory period, 3. Action Potential, 4. Threshold Potential, 5. K+ Conductance & 6. Na+ Conductance 

C.

1. Absolute Refractory period, 2. Relative Refractory period, 3. Threshold Potential, 4. Action Potential, 5. K+ Conductance & 6. Na+ Conductance 

D.

1. Relative Refractory period, 2. Absolute Refractory period, 3. Threshold Potential, 4. Action Potential, 5. K+ Conductance & 6. Na+ Conductance 

Show Answer

Correct Answer � A

Explanation

Ans. A. 1. Absolute Refractory period, 2. Relative Refractory period, 3. Action Potential, 4. Threshold Potential, 5. Na+ Conductance & 6. K+ Conductance .

1. Absolute refractory period (the period during which another action potential cannot be elicited)

2. Relative refractory period (the period during which a second action potential can be elicited, but only by a larger than normal stimulus)

3. Action potential

4. Threshold potential; depolarization of the membrane to this level results in an action potential

5. Na+ conductance

6. K+ conductance

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