Pellicle

Definition

A pellicle is a flexible, protective layer found just beneath the plasma membrane of certain unicellular eukaryotic organisms. It provides structural support and maintains cell shape while allowing some degree of flexibility.

5 Must Know Facts For Your Next Test

1. The pellicle is commonly found in protozoa such as Euglena and Paramecium.
2. It consists of a series of protein strips arranged in a helical pattern around the cell.
3. The pellicle allows for gliding motility by flexing and contracting.
4. It serves as a protective barrier against environmental stress and predation.
5. The composition and structure of the pellicle can vary between different species of unicellular eukaryotes.

Review Questions

Related terms

Cytoskeleton:

A network of protein filaments that provides structural support to cells.

Plasma Membrane: The outer boundary of the cell that controls what enters and exits.

Euglena:

A genus of single-celled flagellate eukaryotes known for their flexible pellicle.