- #1
kyang002
- 22
- 0
Measurements with microelectrodes have shown that a 0.30-nm-diameter potassium ion (K+) channel carries a current of 1.8 pA.
How many potassium ions pass through if the ion channel opens for 1.0 ms?
What is the current density in the ion channel?
I am completely lost for this one. Anyone know of any equations that I can use?
Current is, its I = dQ/dt, the flow of charge through a point, through time. Like measuring the flow of water through a pipe.
The area the flow is going through (the inner area of the "pipe") because they give you the diameter. area = pi*r^2, 2*r = diameter.
I = dQ/dt = n*A*q*dx/dt = n*A*q*Velocity
so first solve I = n*A*q*Velocity
then use that with velocity = dx/dt to get dx.
Then use dQ = (n*A*dx)*q
to get dQ.
But I am stuck on how to solve for the variables and how to complete the problem. Can anyone help me out with the answer?
How many potassium ions pass through if the ion channel opens for 1.0 ms?
What is the current density in the ion channel?
I am completely lost for this one. Anyone know of any equations that I can use?
Current is, its I = dQ/dt, the flow of charge through a point, through time. Like measuring the flow of water through a pipe.
The area the flow is going through (the inner area of the "pipe") because they give you the diameter. area = pi*r^2, 2*r = diameter.
I = dQ/dt = n*A*q*dx/dt = n*A*q*Velocity
so first solve I = n*A*q*Velocity
then use that with velocity = dx/dt to get dx.
Then use dQ = (n*A*dx)*q
to get dQ.
But I am stuck on how to solve for the variables and how to complete the problem. Can anyone help me out with the answer?