Insulin lowers blood glucose, its deficiency causes diabetes. Adrenaline prepares for 'fight or flight', a lack isn't a typical disease but severe stress can feel like a deficit. Thyroxine regulates metabolism, its shortage is hypothyroidism, making one sluggish.
Studying for NEET, I see these as fixed textbook facts. But watching my father limp home, his knee ache defying all his body's hormones, I know life’s malfunctions aren’t always so neatly listed.
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