Rocks? not quite sure about this one but good luck and hope this helps! :)
Answer: I would say its probably A I'm not sure but that might be it
Explanation:
In brain chemistry, synapses are very important. Synapses have a number of different forms but have two basic varieties:. excitatory and inhibitory. Excitatory synapses make it more likely that a neuron will send its message to other neurons, whereas inhibitory synapses make it less likely that a neuron will send its message.
Humans have 23 pairs of autosomes 46 in total