W E Inject a Slightly Depolarizing Current into an Axon

question 10

Multiple Choice

W e inject a slightly depolarizing current into an axon at x = 0 cm continuously monitor the potential at x = 5 cm away. At steady state, the resting membrane potential is -70 mV. At the point of injection,the potential is -60 m V and at x = 5 cm away it is -66.3 mV. W hat is the space constant?

• A) 2.5 cm
• B) 5.0 cm
• C) 10.0 cm
• D) 15.0 cm
• E) 20.0 cm

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