In which event is the combined effect of nervous and hormonal control most clearly demonstrated?
Answer and explanation
Correct answer: Seeing danger makes the body alert and increases adrenaline secretion.
Seeing danger begins with the sense organs and nervous system, which rapidly analyse the stimulus and prepare an immediate response. The nervous system also stimulates the adrenal glands, causing adrenaline release. Adrenaline then supports the longer-lasting emergency response by increasing heart rate, breathing, and blood supply to muscles. Therefore option A shows both rapid nervous control and chemical hormonal control together. The other events do not involve this coordinated body response.
Frequently asked questions
What is the correct answer to this question?
Seeing danger makes the body alert and increases adrenaline secretion.
Why is this the correct answer?
Seeing danger begins with the sense organs and nervous system, which rapidly analyse the stimulus and prepare an immediate response. The nervous system also stimulates the adrenal glands, causing adrenaline release. Adrenaline then supports the longer-lasting emergency response by increasing heart rate, breathing, and blood supply to muscles. Therefore option A shows both rapid nervous control and chemical hormonal control together. The other events do not involve this coordinated body response.
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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