# Answered Essay: a. Given the Chloride reversal potential, V_Ct = -68 mV, will Cl^- ions flow into the cell or out

a. Given the Chloride reversal potential, V_Ct = -68 mV, will Cl^- ions flow into the cell or out of the cell when V > V_Ct, where V is the membrane potential? Will this flux of Cl^- cause the membrane potential to increase or decrease? Explain. b. The concentration of potassium ions inside and outside the cell are about c_in = 0.14 M and c_out = 0.005 M, respectively, what is the K^+ reversal potential, V_K, if kT/e = 25.8 mV, and the ion valence is z = 1? c. Unlike the passive Chloride channel, potassium channels have a variable conductance. If the potassium channel is open (g_K > 0) and V = V_Ct, will K^+ ions flow into the cell or out of the cell? Will this flux of K^+ cause the membrane potential to increase or decrease? Explain. d. For sodium, ions, the ionic concentration is much greater outside the cell than inside, z = 1, and the reversal potential is V_N almostequalto 50 mV. If V = V_Ct, will the opening of the Na^+ channel (g_Na > 0) cause the membrane potential to increase or decrease? Explain.

a) Reversal Potential is the membrane potential where the net flow through any open channels is 0.

VCl = -68 mV is the reversal potential for Chloride

When V > VCl , concentration gradient does not change but electrical gradient will be there. It will be weak inside and hence the net Cl ions will flow out of the cell through any open C channels. Membrane potential will increase with the flux to reach the resting potential so that no net flow could take place and equilibrium between electrical and concentration gradient can be maintained.

b) Cin = 0.14 M

Cout = 0.005 M

kT/e = 25.8 mV and z = 1

Reversal Potential, $V_{K}=\frac{kT}{ez}ln\frac{[K^{+}]_{outside}}{[K^{+}]_{inside}}$

VK = (25.8)ln [0.005/0.14]

VK = -85.971 V

Pages (550 words)
Approximate price: -

Help Me Write My Essay - Reasons:

Best Online Essay Writing Service

We strive to give our customers the best online essay writing experience. We Make sure essays are submitted on time and all the instructions are followed.

Our Writers are Experienced and Professional

Our essay writing service is founded on professional writers who are on stand by to help you any time.

Free Revision Fo all Essays

Sometimes you may require our writers to add on a point to make your essay as customised as possible, we will give you unlimited times to do this. And we will do it for free.

Timely Essay(s)

We understand the frustrations that comes with late essays and our writers are extra careful to not violate this term. Our support team is always engauging our writers to help you have your essay ahead of time.

Customised Essays &100% Confidential

Our Online writing Service has zero torelance for plagiarised papers. We have plagiarism checking tool that generate plagiarism reports just to make sure you are satisfied.

Try it now!

## Calculate the price of your order

Total price:
\$0.00

How it works?

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

HOW OUR ONLINE ESSAY WRITING SERVICE WORKS

Let us write that nagging essay.

By clicking on the "PLACE ORDER" button, tell us your requires. Be precise for an accurate customised essay. You may also upload any reading materials where applicable.

Pick A & Writer

Our ordering form will provide you with a list of writers and their feedbacks. At step 2, its time select a writer. Our online agents are on stand by to help you just in case.

Editing (OUR PART)

At this stage, our editor will go through your essay and make sure your writer did meet all the instructions.