What in a cell tells it what to do? : )

The nucleus which contains all of the cell's information does.

When talking about cells it can get complicated so if you think about the cells like a team, more specifically a baseball team. The coach would be the nucleus, it trains the cells/players. It provides plays/or ways to defeat viruses. The players would be the white blood cells, the one's fighting the enemy virus/team. 

Your answer would be: nucleus... (the coach)

Hope this helps, I like to create scenes too help me better understand things.

The answer should be geothermal i hope i’m right message me if i’m wrong and i’ll change my answer and fix it for you

Neurotransmitters are messengers responsible for communication between neurons. they are released from synaptic vesicles and are received by receptors.  the communication is referred to as neurotransmission. the following statement is true about neurotransmitters: a. they're stored in synaptic vesicles in the axon.