ENGR 093: Biomedical Directed Reading Spring 2004  
Home Hodgkin and Huxley's work Biology History Table of Units References

  SI Table

During the course of our research, we have found that the units used in the explanations of the Hodgkin and Huxley model in common textbooks often disagree. This can make it difficult for students looking at the model for the first time to get a good sense of what is going on. In an effort to help alleviate some of the confusion, the table below consistes of values and units found in popular textbooks and have been converted into SI Units. Note that the equations used are based off thosed depicted in the Enderle and Schwann texts. Due to inconsistences between the two resources, where Schwann used a voltage, a negative voltage equal in magnitude but opposite in sign was used.


System International (SI) Units

Symbol Units Quantity Notes
GNa S/m²
0.12
 
GK S/m²
0.036
 
GL S/m²
0.0003
 
VNa V
0.055
 
VK V
-0.072
 
VL V
-0.0494
 
gNa V/m²
gNam3h
 
gK V/m²
gKn4
 
gL V/m²
gL
 
ah 1/s
 
bh 1/s
 
am 1/s
 
bm 1/s
 
an 1/s
 
bn 1/s
 
ho 1
ah/(ah+bh)=0.596
 
th s
1/(ah+bh)
 
mo 1
am/(am+bm)=0.053
 
tm s
1/(am+bm)
 
no 1
an/(an+bn)=0.318
 
tn s
1/(an+bn)
 
Cm farads    

Link to table of HH, Enderle, Scott, Hoppensteadt, Schwan, SI resources.

 


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