Vacuoles usually account for changes in cell size when the cytoplasmic volume stays constant. Some vacuoles have specialized functions, and plant cells can have more than one type of vacuole.

Key regulators of stomata are plant vacuoles ... storage vacuoles of neutral pH, and the lytic vacuoles of acidic pH, which are equivalent in function to lysosomes in mammalian cells (Figure ...

releasing energy for the cell Plant and animal cells Large central vacuole Contains a liquid called cell sap, which keeps the cell firm Plant cells only Cell wall Made of a tough substance called ...