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Biology

Body Fluids and Circulation

A Biology chapter of the NEET syllabus, and how to practise it for the computer-based exam.

Exam rules change between cycles. Confirm dates, syllabus and pattern against NTA's official site. We are not NTA.

Weightage: what the paper actually did

Body Fluids and Circulation carried 5 questions in the NEET 2026 paper. One paper is a data point, not a destiny: NTA moves weight between chapters every cycle, which is why the weightage tables deserve care. The stable facts are the paper's shape: 180 questions, 720 marks, +4 right, −1 wrong.

Sample PYQs from this chapter

Real questions NTA asked from Body Fluids and Circulation, with the answer and the working. Try before you peek.

Question 1 · NEET 2026

The number of action potentials generated by sino-atrial node (SAN) in a healthy human is _______ per minute.
  1. A.28 - 30
  2. B.70 - 75
  3. C.100 - 110
  4. D.120 - 140
Answer and explanation

Answer: B

The sino-atrial node is the pacemaker of the heart because it generates action potentials faster than any other part of the conducting system - about 70 to 75 per minute, which sets the normal resting heart rate. The atrio-ventricular node and Purkinje fibres can also fire spontaneously but at slower rates, so they only take over if the SAN fails. NCERT Class 11, Body Fluids and Circulation.

Question 2 · NEET 2026

Which of the following statements is incorrect?
  1. A.Blood coagulates in response to an injury
  2. B.Blood clot consists of fibrins
  3. C.Fibrin is produced from fibrinogen
  4. D.Fibrinogen is produced from fibrin
Answer and explanation

Answer: D

During blood coagulation, thrombin converts soluble plasma fibrinogen into insoluble fibrin threads. Those threads form a mesh that traps blood cells to make the clot. Reversing fibrin and fibrinogen gives the wrong direction for this step.

How to practise Body Fluids and Circulation

Chapter by chapter, against real past-paper questions, on a screen: NEET is computer based from 2027. Read the chapter once, then attempt its PYQs until your accuracy stops climbing, and let the wrong answers tell you which lines to reread. If the chapter keeps refusing to stick, that has its own guide. There is also a free NEET mini mock with answers.

Nearby Biology chapters

Questions

How many questions did Body Fluids and Circulation have in NEET 2026?

Body Fluids and Circulation carried 5 questions in the NEET 2026 paper. Weightage shifts between cycles, so treat it as a probability, not a promise.

Where can I practise Body Fluids and Circulation PYQs for NEET?

Explore available chapter-wise NEET practice in BrainIt, free until the 2027 exam. Review explanations and track chapter accuracy to guide your revision. Sample questions from this chapter are on this page.

Is Body Fluids and Circulation important for NEET 2027?

It is part of the Biology syllabus the paper draws from, and NEET 2027 is computer based, so practise it on a screen. Your own accuracy in the chapter matters more than any weightage table: a heavy chapter you already score well on needs less time than a light one you keep missing.

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