AIIMS2004Zoology-Human Physiology
AIIMS 2004 Zoology Circulatory System MCQ Question
Type: MCQ-conceptual-Medium-Class 11
In which one of the following pairs the two items mean one and the same thing?
A
malleus - anvil
B
SA node - pacemaker
C
leucocytes - lymphocytes
D
haemophilia - blood cancer
Correct Answer
Option B
Detailed Explanation
SA node or sino-atrial node is known as the pacemaker of heart because the cells in the SA node contract the most number of times per minute.
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