NCERT · Class 11 · Biology · Body Fluids and CirculationWhat does the 'Dub' sound of the heart correspond to during a cardiac cycle?
Step-by-Step Solution
The second heart sound 'Dub' is associated with the closure of the semilunar valves.
Detailed Options Breakdown
Option : Closure of AV valves
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Body Fluids and Circulation.
Option 1: Closure of semilunar valves (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Opening of AV valves
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Body Fluids and Circulation.
Option 3: Opening of semilunar valves
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Body Fluids and Circulation.
💡 Study Guide: This question tests core syllabus concepts from Body Fluids and Circulation. For formulas, key summaries, and mock exam reference guides, read the full Body Fluids and Circulation Revision Notes.