The hormone that opposes the action of glucagon and lowers blood glucose is: MCQ with Answer and Explanation

Explanation:
Graves' disease is an autoimmune condition where the immune system produces thyroid-stimulating immunoglobulins (TSIs). These autoantibodies bind to and mimic the action of Thyroid Stimulating Hormone (TSH) on the TSH receptors of the thyroid gland. This continuous, unregulated stimulation causes the thyroid to overproduce thyroid hormones (T3 and T4), leading to hyperthyroidism, goiter, and often exophthalmos (bulging eyes).

Explanation:
The liver contains enzymes (cytochrome P450 system) that metabolize and detoxify alcohol, drugs, and other xenobiotics, converting them to less toxic, excretable forms. The kidneys excrete waste, stomach digests, pancreas secretes enzymes.

Explanation:
Daniel Koshland proposed the induced fit model (1958), where enzyme active site changes shape upon substrate binding. Fischer had proposed lock-and-key.