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प्रश्न
Write the features that distinguish between the two.
Sino-atrial node and Atrio-ventricular node
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उत्तर
| Sino-atrial node | Atrio-ventricular node |
| 1. SA node is present in the right upper comer of the right atrium | 1. AV node is present in the lower left comer of the right atrium |
| 2. It initiates and maintains the rhythmic contractile activity of the heart | 2. It passes the electrical impulses from SA node to AV bundle |
| 3. It is also called pace-maker | 3. It is also called pace-setter |
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Statement 1: Atria receive blood from all parts of the body which subsequently flows to ventricles.
Statement 2: Action potential generated at sino-atrial node passes from atria to ventricles.
Define the following terms and give their location?
Purkinje fibre
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Answer the following:
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In the diagrammatic presentation of heart given below, mark and label, SAN, AVN, AV bundles, bundle of His and Purkinje fibres.
Cardiac activities of the heart are regulated by ______.
- Nodal tissue
- A special neural centre in the medulla oblongata
- Adrenal medullary hormones
- Adrenal cortical hormones
Choose the correct answer from the options given below:
