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MODEL PAPER - 4 [2026] — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMODEL PAPER - 4 [2026]5 Marks
Question
a. Name the hormone secreted by (i) Pituitary, and (ii) Thyroid stating one main function of each. Name the disorder a person is likely to suffer from due to the deficiency of the above mentioned hormones.
b. How is the timing and amount of hormone released regulated? Explain with an example.
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Answer

a.
Name of hormoneFunctionDisease
Growth Hormonestimulates growth of organsGigantism
Thyroxineregulates carbohydrates, proteins and fat metabolismGoitre

b. It is regulated by feed back mechanism. Hormones has to be released in appropriate amount
Example:
- Rise in sugar level leads to more secretion of insulin from the pancreas
- Fall in sugar level leads to less secretion of insulin
- Return to Homeostasis: With decreased TRH and TSH stimulation, the thyroid gland reduces its production of T3 and T4, helping to maintain hormonal balance and return to homeostasis.

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