SOPHIA CHALLENGES, MILESTONES, AND TOUCHSTONES Sophia Human Biology Milestone 3 1 Which of these is TRUE of a neuron at resting potential? The neuron has more positive charges inside than outside. The neuron has more potassium ions inside than outside. Sodium -potassium pumps transport potassium ions out of the neuron. Sodium -potassium pumps transport sodium ions into the neuron. CONCEPT Membrane Potential and Action Potential 2 Which structure of the ear monitors movement and equilibrium via its semic ircular canals and two fluid -
filled sacs? Tectorial membrane
filled sacs? Tectorial membrane
