Exam 3-3 Flashcards by Lauren Oberle

Q

Which gates are open: before depolarization

A

inact gate

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Q

Which gates are open: depolarization

A

both Na

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Q

Which gates are open: repolarization

A

Na act and K

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Q

Which gates are open: refractory period

A

K

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Q

VG Na channels

A

S4 detects

positive feedback

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Q

Na>K?

A

yes = AP

- no = resting Vm

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Q

ENa =

A

60 mV

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Q

Ek =

A

-90 mV

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Q

resting Vm =

A

-70 mV

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Q

Na/K structures: voltage sensing

A

S4

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Q

Na/K structures: activation gate

A

S5-6

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Q

Na/K structures: inactivation gate

A

III - loop - IV

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Q

gating is controlled by

A

Vm

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Q

S4 has ___ or ____ every ____ residue

A

lysine
arginine
3rd

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Q

N-term is in the ______ and the C-term is in the ______

A

both in the cytoplasm

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