Circulation: heart, cardiac cycle, ECG, double circulation, regulation, disorders
Top questions
See all →- Cardiac activities of the heart are regulated by :A. Nodal tissueB. A special neural centre in the medulla oblongataC. Adrenal medullary hormonesD. Adrenal cortical hormonesChoose the correct answer from the options given below : Answer: 1. A, B and C Only Key idea: The heart is regulated by nodal tissue (autorhythmic), the medullary cardiac centre (neural) and adrena... 1
- Match List I with List II :List I:A. P waveB. QRS complexC. T waveD. T-P gapList II:I. Heart muscles are electrically silent.II. Depolarisation of ventricles.III. Depolarisation of atria.IV. Repolarisation of ventricles.Choose the correct answer from… Answer: 3. A-III, B-II, C-IV, D-I Key idea: read the ECG waves. P wave - depolarisation of atria (A-III). QRS complex - depolarisation of ve... 1
- Following are the stages of pathway for conduction of an action potential through the heart:A. AV bundleB. Purkinje fibresC. AV nodeD. Bundle branchesE. SA nodeChoose the correct sequence of pathway from the options given below : Answer: 2. E-C-A-D-B Key idea: the impulse follows the heart's conducting system in a fixed order. SA node (pacemaker, E) → AV node (C) → AV... 1
- Match List I with List II.List I: A. P - wave; B. Q - wave; C. QRS complex; D. T - waveList II: I. Beginning of systole; II. Repolarisation of ventricles; III. Depolarisation of atria; IV. Depolarisation of ventriclesChoose the correct answer from th… Answer: 2. A-III, B-I, C-IV, D-II Key idea: Link each ECG wave to the heart event. P wave: depolarisation of the atria (III). Q wave: beginn... 1
- Which one of the following statements is correct ? Answer: 4. Blood moves freely from atrium to the ventricle during joint diastole. Key idea: During joint diastole, both atria and ventricles... 1
- The QRS complex in a standard ECG represents : Answer: 3. Depolarisation of ventricles In an ECG, the P wave is atrial depolarisation, the QRS complex is ventricular depolarisation (the s... 1