Question

The hormone which regulates the growth and metamorphosis in frog is
A. Adrenaline
B. Insulin
C. Thyroxine
D. Cortisol

Answer 1

Metamorphosis incorporates the formative changes during the life expectancy of a creature. The thyroxine hormone delivered from the thyroid organ brings the formative changes during the metamorphosis. Thyroxine manages the digestion of an organism.Metamorphosis is a cycle which changes larval stage over to tadpole lastly into a frog. It was demonstrated by the ectomy (evacuation) of the thyroid organ in some larval stages of frog, which indicated truth be told, next to little development.

Complete answer:
A. Adrenaline, otherwise called emergency hormone, is discharged from the adrenal medulla. This hormone is related to support of homeostasis in the body and is discharged because of any sort of stress or crisis in the body.
B. Insulin is emitted from the β-cells of the islet of Langerhans and directs blood glucose levels.
C. Thyroxine is emitted from the thyroid organ. It animates the utilization of oxygen by metabolically dynamic tissues and furthermore expands the oxidation of glucose in tissues.
D. Cortisol is a glucocorticoid hormone emitted from the adrenal cortex and directs starch digestion , capacity of glycogen and expanded reabsorption of sodium and water from the renal tubules.
In frogs, development and transformation (advancement of frog from tadpole stage to grown-up stage) is managed by the thyroxine organ.
Along these lines, the right answer is 'Thyroxine'.

So, the correct answer is option C.

Note: Thyroid hormone (TH) is the main hormone in frog metamorphosis, a formative cycle which won't happen without TH however can be actuated intelligently by exogenous TH. Notwithstanding, such medicines remembering for vitro TH medicines regularly don't imitate the functions of characteristic transformation in numerous organs, including lung, mind, blood, digestive tract, pancreas, tail, and skin. Early analysis indicated that TH is needed for metamorphosis. Removal of TH through undeveloped thyroidectomy or treatment of tadpole around or before the beginning of feeding with compound inhibitors of TH biosynthesis (thiourea, propylthiouracil, potassium permanganate, methimazole) totally hinders formative movement past the foot paddle stage.