INA (NA) Inj (NA) 0.8 -0.8 -1.6 -2.4 0 How does the relationship between INa and IK change as the stimulus current increases? What happens with these currents at the threshold current? Voltage (mV) 15 -15 -30 -45 -60 -75 1 2 3 5 6 2406284 28 16 0 0 -3.2 -4 0 1 2 0.5 0.4 0.3 0.2 0.1 43210 0 -0.1 ° 1 2 IK (NA) Blue initial current at 24.5 nA Purple= 24.6 Burgundy=24.7 Red=24.71 5

Human Anatomy & Physiology (11th Edition)
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ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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How does the relationship between INa and IK change as the stimulus current
increases? What happens with these currents at the threshold current?
Voltage (mV)
15
0
-15
-30
INA (NA)
Inj (nA)
-45
-60
-750
IK (NA)
28
24
20
16
12
2211
84062840
0
0.8 F
0
-0.8
-1.6
-2.4
-3.2
-4
odo
0
1
1
Burgundy=24.7
Red=24.71
2
2
0.5
0.4
0.3
0.2
0.1
0
-0.1
0
2
Blue initial current at 24.5 nA
Purple= 24.6
2
3
3
5
5
5
5
7
Transcribed Image Text:How does the relationship between INa and IK change as the stimulus current increases? What happens with these currents at the threshold current? Voltage (mV) 15 0 -15 -30 INA (NA) Inj (nA) -45 -60 -750 IK (NA) 28 24 20 16 12 2211 84062840 0 0.8 F 0 -0.8 -1.6 -2.4 -3.2 -4 odo 0 1 1 Burgundy=24.7 Red=24.71 2 2 0.5 0.4 0.3 0.2 0.1 0 -0.1 0 2 Blue initial current at 24.5 nA Purple= 24.6 2 3 3 5 5 5 5 7
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