Ectoplasm

Definition

Ectoplasm is the outer, more viscous region of the cytoplasm in certain unicellular eukaryotic organisms, such as protozoa. It plays a role in cell movement and shape maintenance.

5 Must Know Facts For Your Next Test

1. Ectoplasm is involved in amoeboid movement by enabling the formation of pseudopodia.
2. It is more gel-like compared to the inner endoplasm, which is more fluid.
3. Ectoplasm contains actin filaments that help maintain cell shape and enable motility.
4. It serves as a barrier protecting internal cellular components from external environment.
5. The ectoplasmic region can be involved in cellular processes like phagocytosis.

Review Questions

Related terms

Endoplasm: The inner, more fluid part of the cytoplasm that contains organelles.

Pseudopodia:

Temporary projections of the cell surface used for movement and feeding.

Actin Filaments: Protein fibers crucial for maintaining cell shape and involved in various forms of cellular motion.