Other Short-term memory facts

I journeyed on to wikipedia to find some other information on short-term memory because the book I am reading is much more reader friendly, so I thought I'd find a more scientific take on it.
This is what one theory about Short-term memory read:
  "Various researchers have proposed that stimuli are coded in short-term memory using transmitter depletion.^[10][11] According to this hypothesis, a stimulus activates a spatial pattern of activity across neurons in a brain region. As these neurons fire, the available neurotransmitters in their store are depleted and this pattern of depletion is iconic, represents stimulus information and functions as a memory trace. The memory trace decays over time as a consequence of neurotransmitter reuptake mechanisms that restore neurotransmitters to the levels that existed prior to stimulus presentation. http://en.wikipedia.org/wiki/Short_term_memory#Synaptic_Theory_of_Short-term_memory"

I took this crazy scientific-ness and decided to dumb it down. It's basically saying that your body reacts considerably to things that happen. As they do happen, your head will fire up with that memory, but as this constantly happens, the older things start to decay and you forget them. I just found this interesting to know.