Zoology-Heart & Circulation
NEET Zoology Heart & Circulation MCQ Question
Type: MCQ-conceptual-Hard-Class 11
Which of the following statements about the heart and circulation is correct?
A
The left ventricle pumps deoxygenated blood to the lungs for oxygenation.
B
The sino-atrial node regulates heart rate by generating action potentials.
C
Blood from the body returns to the left atrium before being pumped to the right ventricle.
D
The pulmonary circulation involves the transport of oxygenated blood to the body tissues.
Correct Answer
Option B
Detailed Explanation
The sino-atrial node is known as the pacemaker of the heart and is responsible for initiating and maintaining the rhythmic contractile activity of the heart. The left ventricle pumps oxygenated blood to the body, and deoxygenated blood returns to the right atrium, not the left.
Found an issue with this question?