Question

fill in the blank question
insulin and
work as \adiposity signals,\ informing the brain of how much adipose tissue the body has and activating
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Explanation:

In the context of adiposity signals (signals related to fat tissue and body energy balance), leptin is a key hormone along with insulin that informs the brain about adipose tissue levels. Leptin is produced by adipose cells and helps regulate energy intake and expenditure by signaling to the brain (hypothalamus mainly) about the body's fat stores. Insulin also interacts in this metabolic signaling pathway related to body fat and energy homeostasis. So the blank should be filled with "leptin" as it, along with insulin, functions as an adiposity signal.

Answer:

leptin