The endocrine regulation in annelids is mainly controlled by:
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Correct answer: Neurosecretory cells
Annelids rely largely on neurosecretory cells. These cells release hormones directly into body fluids.
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More Comparative Endocrine Systems in Animals questions
- Which hormone controls color change in crustaceans?
- The corpora cardiaca in insects primarily function as:
- Which endocrine feature is common to both insects and vertebrates?
- Which hormone regulates carbohydrate metabolism in vertebrates but has no direct counterpart in insects?
- The endocrine system becomes more complex with evolution primarily due to:
- Which vertebrate group shows the earliest appearance of a well-developed endocrine system?