Re: How long should I spend in Buenos Aires and Santiago. I have to agree, BA is amazing, especially if you are hanging with one of the locals! It is a great city with plenty to do in the day time and even more at night. Be prepared to stay out late... I was there for 6 days and loved it.e: How long should I spend in Buenos Aires and Santiago. If I only had one month in South America, I wouldn't spend much time at all in Santiago de Chile. It can be pleasant but I didn't think it was anything special at all. Most people are very enthusiastic about BA.
Ch.5: Synaptic Activity. Introduction. 1  Otto Loewi studied the heart of the frog, which-like our own hearts-is supplied by two different peripheral nerves. 2  One, the sympathetic nerve, excites the heart and makes it beat more rapidly; the other, the vagus, shows the heart. The influx of calcium during depolarization of the endfoot appears to activate a system of microtubules within the endfoot. 2  The microtubules exert mechanical force and induce the movement of vesicles toward the presynaptic membrane. 3  The vesicles then eject neurotransmitter into the synaptic cleft.
The definition of a synapse is the junction between two neurons or nerve cells where there is a small gap that neurotransmitters help nerve impulses to cross.