Which is NOT a step in the negative feedback mechanism for homeostasis?

In a negative feedback mechanism, the process involves several key steps that work together to maintain homeostasis. The receptor is the first component that detects changes in the internal environment, such as fluctuations in temperature or pH levels. Once a change is sensed, the control center, which is typically the brain or endocrine glands, receives these signals and processes the information. Following this, the control center sends instructions to effectors, which are organs or cells that enact the corrective action to restore the equilibrium.

The correct answer indicates that receptors do not send signals directly to effectors. Instead, they communicate the detected change to the control center, which then coordinates the response. This hierarchical approach ensures that the response is appropriate for the change detected, rather than allowing effectors to respond independently, which could potentially lead to uncoordinated or excessive responses that disrupt homeostasis.

This structured communication is essential in biological systems to achieve effective regulation and control, ensuring that the body's internal environment remains stable despite external changes.