Question detail
Explain how negative feedback regulates thyroxine levels in the body.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Hormonal coordination in humans
Question
Explain how negative feedback regulates thyroxine levels in the body.
Answer
Negative feedback regulates thyroxine levels by detecting changes in thyroxine concentration in the blood. When levels are low, the hypothalamus releases TRH, stimulating the pituitary gland to secrete TSH, which prompts the thyroid gland to produce more thyroxine. Conversely, when thyroxine levels are high, TRH and TSH secretion decreases, reducing thyroxine production.
Explanation
This answer is strong because it clearly outlines the process of negative feedback and the roles of TRH, TSH, and thyroxine. The question tests the student's understanding of feedback mechanisms in hormonal regulation.
Common mistake
Misinterpreting Feedback Diagrams
Students often confuse the roles of thyroxine and adrenaline in feedback diagrams, leading to incorrect interpretations of how these hormones regulate bodily functions.
To fix this, students should focus on understanding the specific functions of each hormone and how they interact in feedback loops. Reviewing the mechanisms of negative feedback for both thyroxine and adrenaline separately can help clarify their distinct roles.
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