Sexual, asexual hope this is what u are looking for
The transmission of an impulse is made possible first by electric signals propagating within a neuron. Then, at the end of the axon called a synapse, chemical substances called neurotransmitters get released to transmit the message. These neurotransmitters then attach to chemical receptors in the following neuron.
Actually many foods for example any fruit that u eat or even a simple thing that includes sugar
we can't choose what color we are so they can't change their color I dont know