VI. In the part of the action potential labeled ‘C’, the Na+ voltage-gated chann
ID: 3511447 • Letter: V
Question
VI. In the part of the action potential labeled ‘C’, the Na+ voltage-gated channels are . . .
A. open
B. closed
C. inactivated
VII. When the Na+ voltage-gated channels are closed, a change in membrane potential can open them.
A. True B. False
VIII. When the Na+ voltage-gated channels are inactivated, a change in membrane potential can open them.
A. True B. False
IX. In the part of the membrane potential graph labeled ‘A’, the K+ voltage gated channels are open.
A. True B. False
X. In the part of the membrane potential graph labeled ‘C’, the K+ voltage gated channels are open.
A. True B. False
XI. The line indicated by ‘E’ is called the _______________ ________________ and for a typical neuron is about _______ mV.
XII. The missing time units on this graph should be labeled as ____________.
1? 3? Time (units?)Explanation / Answer
ANSWER VI
In the part labelled C the Na+ voltage gated channels are : B. CLOSED
ANSWER VII
TRUE - when the membrane potential becomes slightly positive than the resting potential due to continued efflux of potassium ions, sodium volatge gated channnels open
ANSWER VIII
TRUE- by a process called deinactivation the inactivated sodium voltage gated channels open when them membrane potential is decreased beyond a certain value
ANSWER IX
FALSE- potassium(K+) voltage gated channels are closed during the resting phase
ANSWER X
TRUE - C is the repolarisation phase where potassium voltage gated channels are open and sodium voltage gated channels are closed
ANSWET XI
The line indicated by E is called the resting state and for a typical neuron is about -70 mV
ANSWER XII
The missing time units on this graph should be labelled as ms ( milli seconds )
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