What effect does adrenaline have on heartbeat?
Answer and explanation
Correct answer: Heartbeat increases
Adrenaline is released during danger, fear, or intense stress. It activates the sympathetic part of the autonomic nervous system and increases the rate and force of heart contraction. This helps deliver more oxygen and nutrients to muscles for rapid action, so option A is correct. Adrenaline does not stop the heart, remove it, or make the heart produce blood; blood cells are formed mainly in bone marrow.
Frequently asked questions
What is the correct answer to this question?
Heartbeat increases
Why is this the correct answer?
Adrenaline is released during danger, fear, or intense stress. It activates the sympathetic part of the autonomic nervous system and increases the rate and force of heart contraction. This helps deliver more oxygen and nutrients to muscles for rapid action, so option A is correct. Adrenaline does not stop the heart, remove it, or make the heart produce blood; blood cells are formed mainly in bone marrow.
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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