Now let me read the key content from the best physiology sources - Costanzo Physiology and Medical Physiology for endocrine pancreas, plus Robbins for glucose homeostasis:

Good content collected. Now let me get more content on insulin structure/synthesis, glucagon, and glucose homeostasis regulation:

Excellent! I have rich content. Now let me get glucagon section and the insulin mechanism/actions sections from Costanzo:

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