Exam 3-3 Flashcards
1
Q
Which gates are open: before depolarization
A
inact gate
2
Q
Which gates are open: depolarization
A
both Na
3
Q
Which gates are open: repolarization
A
Na act and K
4
Q
Which gates are open: refractory period
A
K
5
Q
VG Na channels
A
S4 detects
positive feedback
6
Q
Na>K?
A
- yes = AP
- no = resting Vm
7
Q
ENa =
A
60 mV
8
Q
Ek =
A
-90 mV
9
Q
resting Vm =
A
-70 mV
10
Q
Na/K structures: voltage sensing
A
S4
11
Q
Na/K structures: activation gate
A
S5-6
12
Q
Na/K structures: inactivation gate
A
III - loop - IV
13
Q
gating is controlled by
A
Vm
14
Q
S4 has ___ or ____ every ____ residue
A
lysine
arginine
3rd
15
Q
N-term is in the ______ and the C-term is in the ______
A
both in the cytoplasm
