AIIMS 2004
- Exam
- AIIMS
- Year
- 2004
- Subject
- Zoology
- Chapter
- Body Fluids and Circulation
AIIMS 2004 · Zoology · Body Fluids and Circulation
In which one of the following pairs the two items mean one and the...
In which one of the following pairs the two items mean one and the same thing?
Options
- AMalleus - anvil
- BSA node - pacemaker
- CLeucocytes - lymphocytes
- DHaemophilia - blood cancer
Correct answer
B. SA node - pacemaker
Step-by-step solution
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 and because each wave of excitation begins here and acts as the stimulus for the next wave of excitation.