Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
Molting is the process by which an arthropod sheds its exoskeleton to allow for growth. It involves the formation of a new, larger exoskeleton beneath the old one, which is then shed.
5 Must Know Facts For Your Next Test
Molting is controlled by hormones, primarily ecdysone.
During molting, arthropods are vulnerable to predators due to their soft, new exoskeleton.
The process includes several stages: pre-molt, molt, and post-molt.
Arthropods can increase significantly in size after each molting cycle.
Molting frequency decreases as the arthropod ages and reaches adulthood.
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Related terms
Exoskeleton: A rigid external covering that provides support and protection for some invertebrates, including arthropods.
Ecdysone: A steroid hormone that regulates molting and metamorphosis in arthropods.
Instar: The developmental stage between successive molts until sexual maturity is reached in arthropods.