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प्रश्न
Answer in only one sentence of the following question:
Mention the role of the pacemaker in human heart.
उत्तर
- The Sinu-auricular (SA) node is the pacemaker of the heart.
- It generates wave of contraction which spread along the wall of atria and bring about their contraction.
- It has highest degree of rhythmicity and is the first to originate the cardiac impulses and determine the rate of heart beat.
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संबंधित प्रश्न
Multiple choice question. Tick (✓) the correct choice:
Human heart has
- one auricle and one ventricle.
- two auricles and one ventricle.
- two auricles and two ventricles.
- one auricle and two ventricles.
Choose the correct answer:
The E.C.G. is used to detect ____________
Given alongside is a diagram of the external features of the heart.
(i) Name the parts ‘1’ to ‘7’.
(ii) What happens if the coronary artery gets an internal clot?
(iii) Which type of blood does part ‘5’ carry?
(iv) Mention one structural difference between part ‘5’ and ‘4’.
Explain the Term
Pace maker
Name the Following
Layer, which surrounds the heart.
Give scientific reason.
Left ventricle is thick than all other chambers of heart.
What is the function of pericardial fluid?
For which of the following reason the SA node acts as the normal pacemaker?
Which of the following event occurs during atrial systole?
A man's heart rate is 68 and cardiac output is 5440. Find the stroke volume.
