P wave of ECG indicates
1. activation of SA node
2. depolarization of atrial muslces
3. spread of excitation froom AV node ot Purkinje fibres
4. repolarization of atria and depolarization of ventricles

P wave of ECG indicates 1. activation of SA node 2. depolarization of atrial muslces 3. spread of excitation from AV node to Purkinje fibres 4. repolarization of atria and depolarization of ventricles

P wave of ECG indicates 1. activation of SA node 2. depolarization of atrial muslces 3. spread of excitation from AV node to Purkinje fibres 4. repolarization of atria and depolarization of ventricles

Read the following statements and select the correct ones (i) Nodal tissue is specialised cardiac musculature in human heart which has the ability to generate action potential due to an external stimuli (ii) Position of SAN - right corner of right atrium (iii) Position of AVN - right corner of ventricle (iv) AV bundle continues from AVN (v) Purkinje fibres are modified cardiac muscle fibres that originate from the atrioventricular node and spread into the two ventricles.

Read the following statements and select the correct ones (i) Nodal tissue is specialised cardiac musculature in human heart which has the ability to generate action potential due to an external stimuli (ii) Position of SAN - right corner of right atrium (iii) Position of AVN - right corner of ventricle (iv) AV bundle continues from AVN (v) Purkinje fibres are modified cardiac muscle fibres that originate from the atrioventricular node and spread into the two ventricles.

Match the Column - I with Column - II {:("Column-I",,"Column-II"),("(a) P-wave",,"(i) Depolarization of ventricles"),("(b) QRS complex",,"(ii) Repolarization of ventricles"),("(c) T-Wave",,"(iii) Coronary ischemia"),("(d) Reduction in the size of T-wave",,"(iv) Depolarization of atria"),(,,"(v) Repolarization of atria"):} Select the correct option:

A : The cardiac impulse which originates from SA node in mammalian heart cannot spread directly from atria to ventricles R : In mammalian heart there is no continuity between cardiac muscle fibres of atria and those of ventricles except AV bundles.

A : The cardiac impulse which originates from SA node in mammalian heart cannot spread directly from atria to ventricles R : In mammalian heart there is no continuity between cardiac muscle fibres of atria and those of ventricles except AV bundles.

Read the following statements : A. The action potential generated by the SA node stimulates both ventricles to undergo simultaneous contraction. B. The heart sound Lubb is associated with the closure of both semilunar valves. C. The QRS complex in ECG represents the depolarization of the ventricles. Select the appropriate option from the following :

Read the following statements : A. The action potential generated by the SA node stimulates both ventricles to undergo simultaneous contraction. B. The heart sound Lubb is associated with the closure of both semilunar valves. C. The QRS complex in ECG represents the depolarization of the ventricles. Select the appropriate option from the following :