Exam 2 Last lecture

Question 1

Potassium channels still form a pore but with

Answer 1

slightly different shapes, different amino acids.

Question 1

K channel

Answer 1

4 genes
4 proteins
24 transmembrane segments

Question 2

SCN genes

Answer 2

Na+
9-10 genes

Question 3

CACNA genes

Answer 3

Ca2+
10 different

Question 4

KCN genes

Answer 4

K+
40 different

Question 5

CLCN genes

Answer 5

Cl-

Question 6

Major function of voltage gated Na channels

Answer 6

Action Potential

Question 7

Different Na channels have different characteristics, e.g.

Answer 7

Some dont inactivate
Provide different AP durations
Have less toxic sensitivity to TTX (cardiac)