Question

Pulse wave is mainly caused by the

• A. systole of atria
• B. diastole of atria
• C. systole of the left ventricle
• D. systole of the right ventricle

Answer 1

The correct option is C

systole of the left ventricle

Explanation of the correct option:

The correct option is C:

1. A short and non-periodic wave formed by a single unit instead of multiple continuous units is called a pulse wave.
2. When the blood flows through the vessels during circulation, it comes out of the left ventricle and the aorta, which results in a pulse wave.
3. Systole can be defined as the period in which the contraction of the ventricles occurs.
4. It occurs between the first and the second sounds in the cardiac cycle.

Explanation of the incorrect options:

Option A:

1. The systole of the atria is defined as the contraction of auricles.
2. The heart starts to beat during the atrial systole.

Option B:

1. Atrial diastole is defined as the relaxation of auricles.
2. It happens before atrial systole.
3. Atrial diastole makes the blood flow into the ventricles passively.

Option D:

1. Systole of the right ventricle is defined as the contraction of the right ventricle.
2. The blood flows forcible into the pulmonary artery and aorta during the right ventricular systole.

Hence, the Pulse wave is mainly caused by the systole of the left ventricle.