Question

The ____ wave represents ventricular repolarization.

The ____ wave represents ventricular depolarization.

The ____ wave represents atrial depolarization?

A(n) _____________     ____________ ______________ is a defect in the wall between the two ventricles.

A(n) _____________     ____________ ______________ is a defect in the wall between the two atria.

The _________________   _______________ return oxygenated blood from the lungs to the heart.

The _________ ventricle pumps blood into the pulmonary circuit.

The _________________ are the external enlarge flaps on the outside of the atria.

1. _______   channels are responsible for the plateau phase.

Answer 1

1. T wave

Justification: In the electrocardiography, T-wave represents the repolarization of ventricles, which represents a crucial stage in the electrical cardiac activity.

2. QRS complex

Justification: In the electrocardiography, QRS complex represents the electrical impulse and indicates the depolarization of ventricles.

3. P wave

Justification: In the electrocardiography, the p-wave represents the depolarization of left and right atrium by corresponding to their contraction and so it indicates the atrial depolarization.

4. Ventricular septum

Justification: A ventricular septum is a birth defect of heart with a hole in its wall which separates two ventricles of heart and so is a defect in the wall between two ventricles.

5. Atrial septum

Justification: An atrial septum is a birth defect of heart with a hole in its wall which separates two atria of heart and so is a defect in the wall between two atria.

6. Pulmonary veins

Justification: Pulmonary veins returns the oxygenated blood from the lungs again back to the left atrium of the heart.

7. Right ventricle

Justification: The right ventricle pumps blood into the pulmonary circuit, by circulating the blood throughout the lungs, whereas the left ventricle pumps blood into the systemic circuit, by circulating the blood to the tissues of the body.

8. Leaflets or cups

Justification: The tricuspid and mitral valves lies between the atria and ventricles and each of these valves has externally enlarged flaps called 'leaflets or cusps'. The tricuspid valve has 3 leaflets and the mitral valve has 2 leaflets.

9. Calcium ion

Justification: In the plateau phase, calcium ion channels are responsible for maintaining depolarization. So, calcium ion channels are responsible for the plateau phase.

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