+50 Vm (mV) 2 3 0 -50 -100 5 4 1 time Answer the following...

+50 Vm (mV) 2 3 0 -50 -100 5 4 1 time Answer the following questions about this graph in your own words: 1. Identify this stage and the ion and charge outside the neuron and the ion and charge inside. 2. Name the stage of the action potential and state which ion is rushing into the neuron. 3. Name the stage or the action potential and state which ion(s) are involved. 4. Name this stage of the action potential and describe what is now happening. 5. This is the return to what stage?

Transcript

00:01 Hello students, in this question we have been given a membrane potential graph and we have in which different parts are labeled as one two three four five and we have to tell what are these different parts and we also have to answer the questions which are being asked.

00:24 Number first question is we have to identify the first this segment labeled as one and the ion which plays a role here also we have to tell what is the ion charge inside and outside of the cell membrane.

00:45 The first number represents the resting potential it is when the neuron returns to the resting voltage before stimulation.

01:01 The role ion which plays a role here is the potassium ion and inside at this stage the inside of the cell is minus 70 millivolts than outside.

01:21 So inside of the cell membrane is negative 70 millivolts and the outside is as compared to this zero or we can say minus 70 millivolts more negative inside than outside.

01:42 Number second question is we have to identify the segment two and segment two of action potential and we have to state which ion is rushing into the neuron.

01:57 This segment two represents the depolarization of the membrane in which sodium channels are open and sodium ions rush inside the cell.

02:19 Number third question asked is we have to tell what is this part of the action potential and state which ions are involved in three.

02:31 The third segment of the action potential represents repolarization of the membrane in which potassium ions potassium ion channels open and potassium ion rushes outside the cell...

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