Biology
Assertion (A): Pulmonary artery carries blood from the right ventricle of the heart to lungs.
Reason (R): Right ventricle supplies oxygenated blood to the lungs through the pulmonary vein.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Respiratory System
6 Likes
Answer
A is True and R is False.
Reason — The pulmonary artery originates from the right ventricle of the heart. It carries deoxygenated blood to the lungs for oxygenation. It is the only artery that carries deoxygenated blood.
The right ventricle pumps deoxygenated blood, not oxygenated. The pulmonary vein does not carry blood from the heart to the lungs; it carries oxygenated blood from the lungs to the left atrium of the heart.
Answered By
2 Likes
Related Questions
Assertion (A): The product of combination of carbon dioxide and haemoglobin is termed as carboxyhaemoglobin.
Reason (R): RBCs carry carboxyhaemoglobin from the tissue cells to blood capillaries. Hence, carbon dioxide gas is exhaled out.
- A is True and R is False.
- A is false and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): The entrance to the oesophagus is guarded by a flap called epiglottis.
Reason (R): Epiglottis closes the entrance of trachea at the time of swallowing food.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Diaphragm contracts and flattens downwards during inspiration.
Reason (R): Diaphragm relaxes and moves upwards to a dome shape during expiration.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Asphyxiation is a condition in which the blood becomes more venous by the accumulation of more carbon monoxide as a result of which the oxygen supply is diminished.
Reason (R): Asphyxiation and hypoxia both are different with respect to the amounts of carbon dioxide and oxygen respectively.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.