What are effectors in the context of homeostasis, and can you provide two examples?

Effectors are structures, such as muscles and glands, that respond to signals from coordination centres to restore optimum internal conditions. For example, muscles can contract to generate heat when body temperature is low, and glands can release hormones to regulate blood glucose levels.

This answer is strong because it clearly defines effectors and provides relevant examples, demonstrating an understanding of their role in homeostasis. The question tests the student's ability to recall and apply knowledge about effectors in biological systems.