Select the part whose main job is to direct an animal cell's activities by sending instructions to different parts of the cell.
cytoplasm cell membrane nucleus
The cell membrane controls which substances enter and leave the cell. The cell membrane also protects the cell from the outside environment.
The cytoplasm is made up of a thick liquid that fills the space inside the cell membrane. The cytoplasm supports the other cell parts and holds them in place. Many important chemical reactions happen in the cytoplasm.
The mitochondria break down sugar to release energy that the cell can use.
The vacuoles store nutrients, such as sugar, in the cell. Vacuoles also store water and waste.
The nucleus directs cell activities. It does this by sending instructions to different parts of the cell.
The chromosomes contain the information that the cell uses for growth and activities. In animal and plant cells, the chromosomes are inside the nucleus.
The nucleus is the master control center for cell activities. The nucleus sends signals and instructions to different parts of the cell. Not every cell has a nucleus, but most plant and animal cells have one.