Describe what happens in terms of ion channels opening and ion movement when a neuron is depolarized. (You don't need to describe repolarization, only depolarization.)

Explanation:

Depolarization occurs when the nerve cell reverses these charges; to change them back to an at-rest state, the neuron sends another electrical signal. The entire process occurs when the cell allows specific ions to flow into and out of the cell.

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

the answer is c.) there is a warm front in region a and a stationary front in region b.