BME 301 Homework #6 - Due 10 am on February 27, 2015
Gating variables
Time constants (ms)
Problem 2. Dependence of steady state gate variables and time constants as a function of
membrane voltage (Vm)
BME 101: Homework 1 Solutions
Problem 1. (+11 points possible)
a. Time constant:
(+1)
From the lecture notes:
(+1)
(+2) Graph:
b.
(+1) Time constant stays the same as in part a:
(+1)
(+2) Graph and ex
BME 301L: Homework 3
Problem I. (5 points possible)
1) Donnan equilibrium occurs when: ENa+ = ECl- = EHCO3- =EK+
= 1.05
Use the ratio and the given concentrations to calculate the other concentrations
BME 101L: Homework 2 Answer Key (24 points possible)
Problem 1 (+13 points possible)
(a) What is the total membrane capacitance, C, and total membrane resistance, R, of
Cell A?
Rm
3kcm 2
R=
=
=
4r 2
S
BME 301 Homework #9 Due 10 am Friday April 3, 2015
Problem 1. Consider a myelinated nerve axon whose cross section is shown in the figure below. We
would like to study this axon using a program writte
BME 301L Homework #9 Solutions
BME 101
Problem 1 (+8 points possible).
a) Consider analog circuit of one unit (ln and lsh) of the myelinated nerve:
Evaluate components:
, where
, where
is the surface
Due 10 am on Friday, April 10th, 2015.
BME301 Homework 10
Problem 1.
A forgetful professor measured the membrane potential of an infinite one-dimensional passive fiber in 3
configurations shown in fig
BME301 Homework 11
Due 7 pm on Wednesday, April 22nd
Problem 1.
d. Assume now that hP = hN = h. Assume also that you can arbitrary move the two electrodes along
the z-axis, while having their distance
Recitation problems from the phase III of the class (04/20/2015):
Problem 1. Consider the idealized temporal waveform of a cardiac action potential in a mouse
Purkinje fiber (Figure 1). This action po
Recitation 2. March 23rd, 2015.
Problem 1. A mammalian neuron is of Hodgkin-Huxley type. Dependences of steady state gate
variables on transmembrane potential are shown in the figure left below. Equil
4. Hodgkin and Huxley rst performed their experiment in the normal sea water; the
Nernst potential for sodium was 57 mV. Later, they replaced some of the extracellular
sodium by choline. At Vclamp = 1
BME 301 Homework #8 - Due
March 20, 201
Problem 1. An infinitely long cylindrical bath with radius is made to be used in the H-H type
electrophysiological experiments. Assume that in the center of the
BME 301 Homework #7 - Due 5 pm on Friday March 6, 2015
Problem 1. A nerve cell is space-clamped. Assume that
,
,
and that the gating variables behave as shown in Fig. 1a. A small subthreshold current