ECG Question ***note*** time 0 indicates when an action potential would begin 3

Question

ECG Question

***note*** time 0 indicates when an action potential would begin

3 part question:

I: What type of cardiomyocyte would produce the traces seen in the figure above?

(a) contractile

(b) autorhythmic

(c) both a and b

(d) not enough info to tell

II: What channel is responsible for creating trace A?

(a) voltage-gated sodium ion channel

(b) voltage-gated potassium ion channel

(c) L-type calcium ion channel

III: Which of the following traces above is causing by the net influx of sodium ions into the cell?

(a) A

(b) B

(c) C

(d) none of the above

Explanation / Answer

i.. The type of cardiomycyte that would produce the traces seen in the figure is( D) Not enough info to tell

ii. The channel responsible for creating trace A is (a) Voltage gated sodium ion channel as sodium channels respond fast.

iii.The traces that are cased by the net influx of sodiums ions into the cell is (a) . A

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