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Lungs are made up of air filled sacs th...

Lungs are made up of air filled sacs the alveloi they do not collase even after forceful expeiration because of

A

Inspiratory Reserve Volume

B

Tidal Volume

C

Expiratory Reserve Volume

D

Residual Volume

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The correct Answer is:
D
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Lungs are made up of air-filled sacs, the alveoli . They do not collapse even after forceful expiration because of

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(i) Tidal volume is 500 ml per min (ii) The respiratory rhythm centre lies in the medulla oblongata. (iii) The trachea, primary, secondary and tertiary bronchi, and initial bronchioles are supported by incomplete cartilaginous rings. (iv) The volume of air remaining in the lungs even after a forcible expiration is functional residual capacity. How many of the above statements are correct?

Read the following four statement (i) - (iv) with certain mistakes in two of them. (i) A water breather expends much more energy in ventilating its respiratoru surface than an air-breathing one. (ii) Lungs become empty after forceful expiration. (iii) Exchange of gases in the lungs are interrupted during expiration. Respiratory movement are controlled by CO_(2) concentration of arterial blood. Which of the above two statements have mistakes ?

Air entering the lungs ends up in tiny sacs called alveoli.From the alveoli, the oxygen diffuses into the blood. The average radius of the alveoli is 0.0050 cm and the air inside contains 14 per cent oxygen. Assuming that the pressure in the alveoli is 1.0 atm and the temperature is 37^(@)C , calculate the number of oxygen molecules in one of the alveoli.

Consider the following statements each with two blanks. (i) Actually, only about overset((1))"_____" mL of air enters the lungs alveoli for the exchange of gases. The remaining fills the respiratory passage and is termed overset((2))"_____" . (ii) The amount of air which one can inhale with maximum effort and also exhale with maximum effort is termed as overset((3))"_____" . It is about overset((4))"_____" in normal adult person. (iii) During normal quiet breathing, on an average, approximately overset((5))"_____" mL of air is inspired or expired by adult human male in each breath. It is termed as overset((6))"_____" volume. Which of the following options gives the correct fill ups for the respective blanks numbers from (1) to (6) in the above statement ?

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