Cell Organelles and Microenvironments

Eukaryotic cells use membrane-bound organelles to keep cell processes organized. The nucleus and mitochondria are two key examples. Because biological membranes are selectively permeable, they create controlled spaces inside each organelle. These small microenvironments support specialized jobs and separate them from the sur...

Eukaryotic cells contain many internal compartments that are separated by membranes within the cytoplasm. These membrane-bound organelles allow specific functions to happen in small microenvironments.

For example, the nucleus is enclosed by a double membrane called the nuclear envelope, which is continuous with the rough endoplasmic reticu...