Your answer is "tiny structures in the cell that carry out the activities."
Cocaine appears to produce its effects largely by increasing the supply of the neurotransmitter dopamine at key neurons throughout the brain. The missing word is dopamine. I hope this is the answer that you were looking for.
They are neither, they do not have the mechanism to ingest or produce food.
Answer:
nucleus-red, membrane-most outer part in of cell in black, centrioles- purple, left the spindle fibers
