Question

a team of scientists is working to formulate a drug that can treat children who are diagnosed with gigantism. which effect should the drug have on patients?

○ starts the secretion of substances from the adrenal gland that decrease growth
○ increases the secretion of substances from the reproductive glands that stop growth
○ stops the secretion of substances from the thyroid gland that cause growth
○ decreases the secretion of substances from the pituitary gland that cause growth

Explanation:

Gigantism is caused by excessive growth hormone (GH) secretion from the pituitary gland during childhood. To treat gigantism, a drug should decrease the secretion of growth - causing substances (growth hormone) from the pituitary gland.

• The first option: Adrenal gland secretions don't directly regulate growth in the context of gigantism, so this is incorrect.
• The second option: Reproductive glands' secretions are not related to the over - growth in gigantism, so this is wrong.
• The third option: The thyroid gland's secretions (like thyroxine) are not the main cause of gigantism, so this is incorrect.
• The fourth option: Since gigantism is due to excess pituitary - derived growth hormone, decreasing its secretion is the correct approach.

Answer:

decreases the secretion of substances from the pituitary gland that cause growth