Jorgensen Specific Values Flashcards
Size limit of cytoplasmic coupling
< 1000 Da
Da size of Calcium ions
40 Da
Da size of NT
~150 Da
Da size of GFP
27 kDA, 2.5 nm
speed of action potential in myelinated axon
150 mm / ms
speed of action potential in unmyelinated axon
10 mm / ms
length (in time) of synaptic delay
0.5 - 3.0 ms
(1 ms)
velocity of action potential
~ 25 mm / ms
(60 mph)
width (in time) of AP
1 ms
range in widths of AP
100 us - 1 ms
how long does it take NTs to diffuse across synaptic cleft?
1 us
distance of synaptic cleft?
20 nm
amount of time it would take NTs to diffuse across 1 mm axon?
30 mins
[Na_in]
5 - 20 mM
(10 mM)
[Na_ex]
130-160 mM
(140 mM)
[K_in]
130-160 mM
(140 mM)
[K_ex]
4-8 mM
(5 mM)
[Ca_in]
.05 - 1 uM
(50nM)
[Ca_ex]
1.2-4 mM
(2mM)
length of synaptic delay
.5 - 3 ms
1 ms
how long does vesicle fusion take?
150 us
how long does diffusion across synaptic cleft take?
1-5 us
(cleft 20-50 nm)
how long does it take LGIC to open?
150 us
[calcium] required for NT release?
~ 25 uM