If adrenaline secretion suddenly increases in a person, which change is most logical?
Answer and explanation
Correct answer: Increase in heartbeat and breathing rate
Adrenaline is a hormone released during danger, fear, or intense stress. It prepares the body for rapid action by increasing cardiac output and commonly increasing the rate and depth of breathing, so more oxygen and nutrients can reach active muscles. Hence option A is correct. Root gravitropism is a plant response, insulin is produced by pancreatic beta cells rather than the retina, and a Mimosa leaf cannot become a seed.
Frequently asked questions
What is the correct answer to this question?
Increase in heartbeat and breathing rate
Why is this the correct answer?
Adrenaline is a hormone released during danger, fear, or intense stress. It prepares the body for rapid action by increasing cardiac output and commonly increasing the rate and depth of breathing, so more oxygen and nutrients can reach active muscles. Hence option A is correct. Root gravitropism is a plant response, insulin is produced by pancreatic beta cells rather than the retina, and a Mimosa leaf cannot become a seed.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Control and Coordination.
