The two ways that synaptic depression can happen are the number of action potentials (electrical signals) sent by the axon to the dendrite , or the number of on the dendrite of the receiving neuron decreases.

The two way synaptic depression can happen are the number of action potentials sent by the axon to the dentrite through gap junctions, or the number of neuro-transmitters on the dentrites of the receiving neuron decrease.

Explanation:

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.