Electrical Signals in Neurons I: Membrane Potential Vocabulary

Concept: Review of Membrane Potentials

5m

Concept: Vocabulary for Membrane Potential Changes

4m

Problem: A neuron is at Vrest= -70 mV. A Na+ channel opens; later, the membrane potential is measured again at Vm=+30 mV. Which of the following accurately describes this change? (Choose all that apply.)

2m

Problem: In the process of carrying a signal, a neuron’s membrane potential goes from +25 mV to -90 mV. The neuron’s usual Vrest= -70 mV. Which of the following accurately describes this change? (Choose all that apply.)

2m