Exams › NEET › Biology

If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?

1. The flow of blood into the aorta will be slowed down.
2. The 'pacemaker' will stop working.
3. The blood will tend to flow back into the left atrium.
4. The flow of blood into the pulmonary artery will be reduced.

Correct answer: The flow of blood into the pulmonary artery will be reduced.

Solution

The tricuspid valve lies between the right atrium and right ventricle, and its chordae tendineae prevent backflow during ventricular contraction. If they are partially non-functional, some blood regurgitates into the right atrium, reducing the amount pumped onward into the pulmonary artery.

Related NEET Biology questions

• Which is true about the difference between cortical and juxtamedullary nephrons?
• Which one of the following is correct?
• Erythropoiesis starts in:
• Person with blood group AB is considered as universal recipient because he has:
• Adult human RBCs are enucleated. Which of the following statement(s) is/are most appropriate explanation for this feature? (1) They do not need to reproduce (2) They are somatic cells (3) They do not metabolize (4) All their internal space is available for oxygen transport
• All the components of the nodal tissue are autoexcitable. Why does the SA node act as the normal pacemaker?

⚔️ Practice NEET Biology free + battle 1v1 →