Molting

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

1. Molting is controlled by hormones, primarily ecdysone.
2. During molting, arthropods are vulnerable to predators due to their soft, new exoskeleton.
3. The process includes several stages: pre-molt, molt, and post-molt.
4. Arthropods can increase significantly in size after each molting cycle.
5. Molting frequency decreases as the arthropod ages and reaches adulthood.

Review Questions

• What hormone primarily controls the molting process in arthropods?
• Why are arthropods particularly vulnerable during the molting process?
• What are the main stages involved in the molting process?

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.