1. Chris Simkonis & Drew Siegrist II

2. Found in plant cells, very important to cell function. Used for storage and to maintain water balance Storage- stores dissolved substances important to the cell Water balance- a central vacuole’s membrane maintains tonicity, which allows expansion and contraction

3. Vacuole means blank space Surrounded by a tonoplast

4. Found in some protists Used to pump water and maintain water balance in the cell

5. 1. A central vacuole’s membrane is also called a: A. storage membrane B. tonoplast C. cell wall D. microtubule 2. Plant cells increase and decrease their size by increasing their: A. nucleus B. cytoplasm C. central vacuole D. contractile vacuole