| (i) In fishes the heart pumps out deoxygenated blood which is oxygenated by the gills and supplied to the body parts from where deoxygenated blood is returned to the heart. |
| (ii) The openings of the right and the left ventricles into pulmonary artery and aorta respectively are provided with the mitral valves. |
| The nodal musculature has the ability to generate action potentials without any external stimuli, i.e. it is autoexcitable |
| (iv) The T-wave of ECG represents depolarisation of the ventricles. |
| Which of the above two statements are incorrect? |
A) (i) and (iii)
B) (ii) and (iv)
C) (i) and (ii)
D) (iii) and (iv)
Correct Answer: B
Solution :
The openings of the right and the left ventricles into the pulmonary artery and the aorta respectively are provided with semilunar valves. The T-wave of ECG represents repolarisation of ventricles.
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