You are recording the resting membrane potential from a neuron placed in a petri dish. The following oscilloscope tracing shows the voltage measured when a microelectrode tip is placed just inside the axon. The solid line on the oscilloscope is obtained when the neuron is placed in a control solution containing 5mM K+ and 150 mM Na+. The solution is then changed and a second recording is made, shown by the dashed line on the tracing. You can reasonably conclude this new solution: a) has increased concentration of K+ b) has increased concentration of Na+ c) has decreased concentration of K+ d) has decreased concentration of Na+
You are recording the resting membrane potential from a neuron placed in a petri dish. The following oscilloscope tracing shows the voltage measured when a microelectrode tip is placed just inside the axon. The solid line on the oscilloscope is obtained when the neuron is placed in a control solution containing 5mM K+ and 150 mM Na+. The solution is then changed and a second recording is made, shown by the dashed line on the tracing. You can reasonably conclude this new solution: a) has increased concentration of K+ b) has increased concentration of Na+ c) has decreased concentration of K+ d) has decreased concentration of Na+
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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You are recording the resting membrane potential from a neuron placed in a petri dish. The following oscilloscope tracing shows the voltage measured when a microelectrode tip is placed just inside the axon. The solid line on the oscilloscope is obtained when the neuron is placed in a control solution containing 5mM K+ and 150 mM Na+. The solution is then changed and a second recording is made, shown by the dashed line on the tracing. You can reasonably conclude this new solution:
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a) has increased concentration of K+ |
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|
b) has increased concentration of Na+ |
||
|
c) has decreased concentration of K+ |
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|
d) has decreased concentration of Na+ |
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Time (sec)
Membrane Potential (mV)
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