Vacuoles

Definition

Vacuoles are membrane-bound organelles found in eukaryotic cells, primarily responsible for storage and maintaining cellular homeostasis. They can store nutrients, waste products, and help regulate turgor pressure in plant cells.

5 Must Know Facts For Your Next Test

1. Vacuoles are more prominent and larger in plant cells compared to animal cells.
2. They play a crucial role in storing water, ions, and other essential molecules.
3. Central vacuoles in plant cells help maintain cell rigidity by regulating turgor pressure.
4. Some vacuoles contain enzymes that break down macromolecules and cellular debris.
5. Contractile vacuoles in protists expel excess water to regulate osmotic balance.

Review Questions

• What is the primary function of vacuoles in eukaryotic cells?
• How do central vacuoles contribute to the rigidity of plant cells?
• What type of vacuole helps protists manage their osmotic balance?

Related terms

Lysosome: An organelle containing digestive enzymes to breakdown waste.

EndoplasmicReticulum: A network of membranes involved in protein and lipid synthesis.

GolgiApparatus: An organelle responsible for modifying, sorting, and packaging proteins for secretion.