CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Assertion :SA node induces excitatory impulses in heart. Reason: SA node is self excitatory.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Assertion is correct but Reason is incorrect.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Both Assertion and Reason are incorrect.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Sinu-auricular node or SA node is located in the wall of the right auricle below the opening of the superior vena cava. The SA node has unique property of self excitation, which enables it to act the 'pacemaker' of the heart. It spontaneously initiates a wave of contraction which spreads over both the auricles more or less spontaneously along the muscle fibres that fan out from the pacemaker.

flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Animal Tissues
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon