1. Tardigrade
  2. Question
  3. Biology
  4. Read the following statements carefully. (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. (iii) 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?

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Q. Read the following statements carefully.
(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.
(iii) 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?

Body Fluids and Circulation

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.