Which of the following hormones regulates carbohydrate, protein and fat metabolism in the body so as to provide the best balance for growth?

Correct option is C

The correct answer is (C) Thyroxin

Explanation:
• Thyroxin is a vital hormone secreted by the thyroid gland directly into the bloodstream. It plays a central role in regulating the body's Basal Metabolic Rate (BMR) and controls the breakdown and synthesis of carbohydrates, proteins, and fats.
• By managing these metabolic processes, thyroxin ensures an optimal balance of energy production and tissue building, which is essential for normal physical and mental growth.
• The synthesis of thyroxin requires iodine. A deficiency of iodine in the diet can lead to a condition called goiter, characterized by an enlarged thyroid gland and a swollen neck.

Information Booster:
• Hypothyroidism (low thyroxin production) can lead to lethargy, weight gain, and slow heart rates, while hyperthyroidism (excessive thyroxin production) can cause rapid weight loss, anxiety, and accelerated heart rates.

Additional Knowledge:
• Insulin (Option A): A hormone produced by the pancreas that specifically regulates blood glucose levels by helping cells absorb glucose, preventing hyperglycemia.
• Epinephrine (Option B): Another name for adrenaline; it acts rapidly during acute stress to prepare the body for immediate physical action.
• Adrenaline (Option D): Secreted by the adrenal glands, this hormone triggers the 'fight-or-flight' response during emergencies by increasing heart rate, blood pressure, and energy output.