Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Microfilaments are thin, thread-like protein structures that form part of the cytoskeleton. They are primarily composed of actin and play key roles in cell movement, shape, and division.
5 Must Know Facts For Your Next Test
Microfilaments are made up of actin monomers organized into two intertwined strands.
They are essential for cellular processes such as cytokinesis during cell division.
Microfilaments facilitate cellular movements including amoeboid movement and muscle contraction.
Actin filaments interact with myosin to enable muscle contractions.
They provide structural support to the cell by forming a network just beneath the plasma membrane.