NCERT · Class 11 · Biology · Body Fluids and CirculationWhich structure acts as the pacemaker of the human heart?
Step-by-Step Solution
The Sino-Atrial Node (SAN) initiates the action potential and acts as the pacemaker of the heart.
Detailed Options Breakdown
Option : AVN
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Body Fluids and Circulation.
Option 1: SAN (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: Purkinje fibres
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Body Fluids and Circulation.
Option 3: Bundle of His
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.