Body Fluids and Circulation — Important Questions
CBSE · Class 11 · Biology
93 important questions from Body Fluids and Circulation for CBSE Class 11 Biology, with answers. Includes multiple choice and multiple correct questions.
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Important Questions from Body Fluids and Circulation
What is the normal heart rate for a healthy adult?
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70-75 beats per minute
The text indicates that the heart normally beats 70-75 times in a minute, with an average of 72 beats per minute.
Which part of the heart is called the 'pacemaker'?
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Sino-atrial Node
The Sino-atrial Node (SAN) generates the maximum number of action potentials and sets the heart's rhythm, making it the pacemaker.
What is the approximate cardiac output for a healthy individual?
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5 litres per minute
The chapter states that cardiac output averages 5000 mL or 5 litres in a healthy individual.
Which component of blood is involved in clotting?
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Platelets
Platelets can release substances involved in blood coagulation or clotting.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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