Heart Function | MCQs

Explanation

During systole, the right ventricle pumps blood into the pulmonary arteries (to the lungs).

The left ventricle pumps blood into the aorta (to the rest of the body).

Explanation

An electrical impulse causes the cardiac cell's resting potential to convert into an action potential.

This action potential leads to contraction of heart muscle cells, enabling the heart to beat.

Explanation

 The heartbeat is normally initiated by the sinoatrial (SA) node, a group of specialized cells in the right atrium, acting as the heart's natural pacemaker. 

Explanation

The aorta is a large, cane-shaped vessel that delivers oxygen-rich blood to your body.

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ND11-12-2022

Explanation

• The muscle part of the heart is called:  Myocardium
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• The cardiac muscle (or myocardium) makes up the thick middle layer of the heart.
• It is one of three types of muscle in the body, along with skeletal and smooth muscle.
  
  

Explanation

• The de-oxygenated blood from the heart comes to the lungs through the Pulmonary artery
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• The deoxygenated blood returns from the body to the right atrium and from there enter the right ventricle that pumps it to the lungs through the main pulmonary artery (pulmonary trunk).
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• The pulmonary veins transport oxygenated blood back to the heart from the lungs