ECG Waveform Analysis & Cardiac Cycles — NEET Biology
📚 Practice Concept📖 NCERT Source
Draw a standard ECG and explain the different segments in it.
Practice This Concept
QuestionPractice Question
Assertion (A): Different vertebrate groups have evolved hearts with varying numbers of chambers. Reason (R): Fishes have 4-chambered hearts while mammals have 2-chambered hearts.
📖 Solution & NCERT Explanation
View solution & NCERT explanation
Correct answer: C — If assertion is true but reason is false.
NCERT confirms evolutionary variation in heart chambers (Assertion true). However, NCERT explicitly states “Fishes have a 2-chambered heart” while “mammals possess a 4-chambered heart” - Reason reverses these numbers, making it false.
❓ Frequently Asked Questions
What does NCERT say about Draw standard ECG and?
Draw a standard ECG and explain the different segments in it.
Has this concept appeared in NEET?
Practice this NCERT concept with questions on MedicNEET.
Which chapter is this from?
Body Fluids and Circulation, Class 11 NCERT Biology.
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180of the ReNEET 2026 paper (all subjects) was already in the MedicNEET question bank
MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.
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