When the level of a hormone in the blood rises and its secretion decreases, which principle is illustrated?
Answer and explanation
Correct answer: Feedback control
The governing concept is negative feedback, a self-regulating mechanism of the endocrine system. When the blood concentration of a hormone becomes sufficiently high, it sends an inhibitory signal to the relevant gland or control centre, reducing further secretion and helping maintain internal balance. Thus option A is correct. A reflex arc is a rapid nervous pathway, whereas hydrotropism and chemotropism are directional growth responses in plants.
Frequently asked questions
What is the correct answer to this question?
Feedback control
Why is this the correct answer?
The governing concept is negative feedback, a self-regulating mechanism of the endocrine system. When the blood concentration of a hormone becomes sufficiently high, it sends an inhibitory signal to the relevant gland or control centre, reducing further secretion and helping maintain internal balance. Thus option A is correct. A reflex arc is a rapid nervous pathway, whereas hydrotropism and chemotropism are directional growth responses in plants.
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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