Neurotransmitters are formed in a presynaptic neuron and stored in small membrane-bound sacks, called vesicles, inside this neuron. When this neuron is activated, these intracellular vesicles fuse with the cell membrane and release their contents into the synapse, a process called exocytosis.
Modern timekeeping defines a day as the sum of 24 hours â but that is not quite correct. The Earth's rotation slows down over time. So in terms of solar time, most days are a little longer than 24 hours.
What determines length of day or year?     The length of the day is 24 hours, this is determined by the amount of time it takes the earth to spin on it's axis one time (23 hrs 56 mins 4.1 secs) . The lengâ¦th of a year is approx 365 days.