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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.

Related tags

Feedback ControlHormone RegulationEndocrine SystemControl And CoordinationWorld Of LivingScienceClass 10 Mcq

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