Insulin secretion increases when blood sugar rises and decreases when sugar becomes normal. Which principle does this show?
Answer and explanation
Correct answer: Negative feedback
The governing concept is homeostasis maintained by negative feedback. When blood glucose rises above its normal range, the pancreas releases more insulin; insulin promotes glucose uptake and storage, bringing the level downward. Once the level approaches normal, the stimulus decreases and insulin secretion also falls. This reversal of the original change makes option A correct. Phototropism and thigmotropism are plant movements, while a reflex arc is a nervous pathway, so B, C, and D are unrelated.
Frequently asked questions
What is the correct answer to this question?
Negative feedback
Why is this the correct answer?
The governing concept is homeostasis maintained by negative feedback. When blood glucose rises above its normal range, the pancreas releases more insulin; insulin promotes glucose uptake and storage, bringing the level downward. Once the level approaches normal, the stimulus decreases and insulin secretion also falls. This reversal of the original change makes option A correct. Phototropism and thigmotropism are plant movements, while a reflex arc is a nervous pathway, so B, C, and D are unrelated.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
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