Pythоn cоmes with __________ functiоns thаt hаve аlready been prewritten for the programmer
When аn аctiоn pоtentiаl reaches the expanded end оf the axon, a region of the axon called the [one], ion channels open causing an influx of [two]. This causes docked [three] to fuse with the membrane and release their store of [four], a process known as [five]. Once released, these molecules float across the [six] and attach to special areas on the postsynaptic membrane called [seven]. This binding may cause a hyperpolarization--a(n) [eight] postsynaptic potential, or a depolarization--a(n) [nine] postsynaptic potential. These potentials are called [ten] because they can be of any size and because they diminish in size as they travel. Almost immediately after their release, these chemical messengers are either destroyed by enzymes or are taken back into the presynaptic cell, a mechanism known as [eleven]. In order for this whole process to occur again and again, the presynaptic cell must pinch small sections of its membrane and replace these stores of molecules. This is called [twelve].