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Khub.info Learn TNPSC exam and online pratice

RESPIRATORY SYSTEM

Q1. What are the organs involved in the respiratory system?
Nose, the wind pipe called Trachea and the two lungs.
Q2. What are lungs and their functions?
They are important organs of the body. They are located on the left and right side of the body in the chest cavity, protected by the ribs. They are spongy organs consisting of elastic tissues. Their main function is to purify (oxynation) the blood and infuse oxygen in the blood. The entire blood (5 ltrs) gets purified through the lungs every minute.
Q3. Which of the two lungs is larger in size?
The right lung is larger than the left to accommodate the heart.
Q4. What is the average weight of the lungs?
Right lung weighs about 620 grams while the left lung weighs about 570 grams together weighing around 1.18 to 1.20 kg for a healthy adult.
Q5. How many ATP molecules are formed at the end of aerobic respiration?
38 ATP (Adenosine Tri-Phosphate).
Q6. What is the total lung capacity of air?
5,000 to 6,000 ml in adult.
Q7. Which mineral is essential to synthesize a respiratory pigment haemoglobin?
Iron.
Q8. What is "Iron Lung"? Who invented it?
Clinically known as "Negative Pressure Ventilator" - An artificial device to assist respiration in an unconscious patient. Invented by Philip Drinker of USA.
Q9. What is the average volume of air inhaled and/or exhaled by a human body?
3.5 ltrs.
Q10. What is the fluid present behind the lungs?
Vitrious humour.
Q11. Two sounds are produced (lab-dub) during each heart beat, they are the result of?
Valve closure.
Q12. What is "Apnoea"?
Difficulty in breathing.