churn in American English. churnverb [ I/T ] [ I ] The water was churning and the boat was rocking. [ M ] The fish churned up the water when we threw them some food. [ T ] fig. Seeing the car ahead flip over churned his stomach.
The nucleus controls everything that happens in the cell. This means that it controls the chemical reactions that take place in both and animal and plant cells. Some organelles in the cell have their own job like mitochondria control the respiratory (for example).
The nucleus, which is basically the brain of the cell, controls the cell's activities. Under it's control are the mitochondria, chloroplasts, ribosomes, and other cell parts. 34 people found this useful. Edit.