Question

The thyroid hormone controls the body's metabolism. The two main hormones thyroid releases are thyroxine (T4) and triiodothyronine (T3), which collectively comprise the thyroid hormone. The thyroid-stimulating hormone (TSH) in the pituitary gland stimulates the thyroid to release the hormones. Ram lives in a remote part of a Himalayan village. He visited the doctor with symptoms of tightness in the throat and a hoarse voice. Given below are the test results: TSH: 6 mIU/L (normal: 0.4-5 mIU/L) T3: 1.76 μg/dL (normal: 4.6-12 μg/dL) T4: 21 ng/dL (normal: 80-180 ng/dL) Blood sugar (post-meal): 180 mg/dL (normal: 170-200 mg/dL) (a) What could be the deficiency disease Ram maybe suffering from? Justify. (b) State TWO reasons why the doctor prescribed a thyroid test.

(a) Name the glands that secrete : (i) Adrenaline (ii) Thyroxin (b) Explain with example how the timing and amount of hormone released are regulated in the human body.

There is a hormone which regulates carbohydrate, protein and fat metabolism in our body. Name the hormone and the gland which secretes it. Why is it important for us to have iodised salt in our diet?